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There is a high prevalence of myofascial pain in people with hypermobile Ehlers-Danlos Syndrome (hEDS). The fascial origin of pain may correspond to changes in the extracellular matrix. The objective of this study was to investigate structural changes in fascia in hEDS. A series of 65 patients were examined prospectively-26 with hEDS, and 39 subjects with chronic neck, knee, or back pain without hEDS. The deep fascia of the sternocleidomastoid, iliotibial tract, and iliac fascia were examined with B-mode ultrasound and strain elastography, and the thicknesses were measured. Stiffness (strain index) was measured semi-quantitatively using elastography comparing fascia to muscle. Differences between groups were compared using one-way analysis of variance. hEDS subjects had a higher mean thickness in the deep fascia of the sternocleidomastoid compared with non-hEDS subjects. There was no significant difference in thickness of the iliac fascia and iliotibial tract between groups. Non-hEDS subjects with pain had a higher strain index (more softening of the fascia with relative stiffening of the muscle) compared with hEDS subjects and non-hEDS subjects without back or knee pain. In myofascial pain, softening of the fascia may occur from increase in extracellular matrix content and relative increase in stiffness of the muscle; this change is not as pronounced in hEDS.

Introduction Frontal plane knee control is essential to athletic knee injury prevention. Aim To evaluate knee valgus frontal plane projection angle (FPPA), knee safety, and sports movement capability confidence during single leg triple hop for distance (SLTHD) under knee sleeve, distal thigh compression garment (DTCG), and no device (control) conditions. Methods A single-session, experimental study was performed using a within-subject design, and randomized device order. Two-dimensional FPPA measurements were collected during the final SLTHD landing of 18 healthy female college athletes for each condition. Sports movement capability and knee safety confidence were measured using 10-cm visual analog scale questions. One-way ANOVA assessed group differences, and Pearson correlations delineated FPPA, knee safety and sports movement capability confidence relationships (p Results The DTCG group had less valgus FPPA than the control group. The knee sleeve group had greater knee safety confidence than the control group. The DTCG (r = 0.48) had a moderate positive relationship between mean SLTHD and knee safety confidence. The DTCG group also had a moderate relationship between maximum SLTHD and knee safety confidence (r = 0.52). The DTCG and knee sleeve groups displayed moderate direct, and moderate inverse relationships between FPPA and sports movement capability confidence (r = 0.48 and r = −0.44, respectively). Conclusion Reduced FPPA and relationships between maximum SLTHD magnitude and knee safety confidence, and between FPPA magnitude and sports movement capability confidence suggests that the DTCG may enhance pelvic deltoid kinesthetic acuity and dynamic knee stability through iliotibial tract compression. Clinical relevance The DTCG was superior to the standard knee sleeve or control conditions for displaying characteristics that might better prevent knee injury, while still enabling effective sports movement capability.

Background Many factors have been reported to affect postoperative range of knee flexion after total knee arthroplasty (TKA); however, no study has reported the impact of preoperative range of motion of the hip to the postoperative flexion angle of the knee thus far. Methods Of 38 consecutive patients who underwent posterior-stabilized TKA, we assessed 21 patients after excluding 17 patients who met exclusion criteria. The range of motion of the knee and the hip, age, body-mass index, serum albumin level, HbA1c, Kellgren-Lawrence grade, knee extension strength and radiological femorotibial angle as well as postoperative knee flexion angle at three months were evaluated. The preoperative data and the knee flexion angle at three months after TKA were compared using Spearman's rank correlation coefficient. Results Knee flexion angle at three months after TKA was positively correlated with preoperative flexion (rho = 0.616, p = 0.007) and external rotation angle (rho = 0.576, p = 0.012) of the hip as well as preoperative knee flexion angle (rho = 0.797, p = 0.001). There were no correlations between postoperative knee flexion angle and other preoperative data. Conclusions Patients with restricted flexion and/or external rotation of the hip may have contractures of Gluteus maximus, Gluteus medius and Tensor fasciae latae, which can cause hypertension of iliotibial tract. It may cause decreased internal rotation of the tibia when the knee is flexed, which affects postoperative knee flexion angle, thus limited flexion and/or external rotation of the hip might restrict knee flexion angle following TKA.

Force myography (FMG), is shown to be a promising alternative to electromyography in locomotion classification. However, the placement of force myography sensors over the thigh during locomotion is not yet clear. To this end, an inhouse developed FMG strap was placed over the thigh muscles of healthy/amputees, while walking on different terrains. The performance of the system was tested on six healthy and two amputees during the five different placements of FMG strap i.e., base, distal, lateral, medial, and proximal. The study reveals that there is an increase in average accuracy (STD) from [mean (STD)] 96.4% (4.0) to 99.5% (0.5) for healthy individuals and 95.5% (3.0) to 99.1% (0.3) for amputees while moving the FMG strap to the proximal of the thigh/stump. The study further determines the combination of three FMG channels on anterior side (Rectus Femoris, Vastus lateralis, and Iliotibial Tract muscles) that provides classification accuracy at par (p > 0.05) to utilizing all eight channels for locomotion classification. The variation of humidity throughout the trials did not significantly (p > 0.05) affect the classification accuracy. The study concludes that the optimal location to place the FMG strap is proximal to the thigh/ stump with a minimum of three FMG channels on the anterior part of the thigh for superior classification accuracy.

AIM OF STUDY To analyze the results of lateral extra-articular tenodesis (LET) of the semitendinosus muscle tendon (STMT) and iliotibial tract (ITT) in patients with severe anterior rotational instability of the knee joint during anatomical anterograde reconstruction of the anterior cruciate ligament (rACL) with a BTB graft. MATERIAL AND METHODS We studied 138 patients with the Pivot shift test – 3+ and the Lachman test 2+ or 3+ degree after arthroscopic rACL with a BTB autograft. In 65 cases (47.1%) rACL was supplemented with LET of STMT (group 1), the remaining 73 patients (52.9%) – LET of ITT (group 2). RESULTS According to IKDC-2000, KOSS and Lysholm-Tegner scores, the groups did not differ statistically. However, pain in the LET zone, LET failure with the appearance of the Pivot shift test – 1+, revision reconstructions – were more often observed in group 2 (p

Purpose To determine the accuracy of detection, injury rate and inter- and intrarater reproducibility in visualizing lesions to the anterolateral ligament (ALL) and the deep portion of the iliotibial tract (dITT) in anterior cruciate ligament (ACL) deficient knees. Methods Ninety-one consecutive patients, out of those 25 children (age 14.3 ± 3.5 years), with diagnosed ACL tears were included. Two musculoskeletal radiologists retrospectively reviewed MRI data focusing on accuracy of detection and potential injuries to the ALL or dITT. Lesion were diagnosed in case of discontinued fibers in combination with intra- or peri-ligamentous edema and graded as intact, partial or complete tears. Cohen’s Kappa and 95% confidence intervals (95% CI) were determined for inter- and intrarater reliability measures. Results The ALL and dITT were visible in 52 (78.8%) and 56 (84.8%) of adult-and 25 (100%) and 19 (76.0%) of pediatric patients, respectively. The ALL was injured in 45 (58.5%; partial: 36.4%, compleate: 22.1%) patients. Partial and comleate tears, where visualized in 21 (40.4%) and 16 (30.8%) adult- and seven (28.0%) and one (4%) peditric patients. A total of 16 (21.3%; partial: 13.3%, compleate: 8.0%) dITT injuries were identified. Partal and complete lesions were seen in seven (12.5%) and five (8.9%) adult- and three (15.8%) and one (5.3%) pediatric patients. Combined injuries were visualized in nine (12.7%) patients. Inter-observer (0.91–0.95) and intra-observer (0.93–0.95) reproducibility was high. Conclusion In ACL injured knees, tears of the ALL are observed more frequently compared to lesions to the deep iliotibial tract. Combined injuries of both structures are rare. Clinically, the preoperative visualization of potentially injured structures of the anterolateral knee is crucial and is important for a more personalized preoperative planning and tailored anatomical reconstruction. The clinical implication of injuries to the anterolateral complex of the knee needs further investigation. Level of evidence II.

PurposeThe purpose of this study was to examine the length change patterns of the native medial structures of the knee and determine the effect on graft length change patterns for different tibial and femoral attachment points for previously described medial reconstructions.MethodsEight cadaveric knee specimens were prepared by removing the skin and subcutaneous fat. The sartorius fascia was divided to allow clear identification of the medial ligamentous structures. Knees were then mounted in a custom-made rig and the quadriceps muscle and the iliotibial tract were loaded, using cables and hanging weights. Threads were mounted between tibial and femoral pins positioned in the anterior, middle, and posterior parts of the attachment sites of the native superficial medial collateral ligament (sMCL) and posterior oblique ligament (POL). Pins were also placed at the attachment sites relating to two commonly used medial reconstructions (Bosworth/Lind and LaPrade). Length changes between the tibiofemoral pin combinations were measured using a rotary encoder as the knee was flexed through an arc of 0–120°.ResultsWith knee flexion, the anterior fibres of the sMCL tightened (increased in length 7.4% ± 2.9%) whilst the posterior fibres slackened (decreased in length 8.3% ± 3.1%). All fibre regions of the POL displayed a uniform lengthening of approximately 25% between 0 and 120° knee flexion.The most isometric tibiofemoral combination was between pins placed representing the middle fibres of the sMCL (Length change = 5.4% ± 2.1% with knee flexion). The simulated sMCL reconstruction that produced the least length change was the Lind/Bosworth reconstruction with the tibial attachment at the insertion of the semitendinosus and the femoral attachment in the posterior part of the native sMCL attachment side (5.4 ± 2.2%). This appeared more isometric than using the attachment positions described for the LaPrade reconstruction (10.0 ± 4.8%).ConclusionThe complex behaviour of the native MCL could not be imitated by a single point-to-point combination and surgeons should be aware that small changes in the femoral MCL graft attachment position will significantly effect graft length change patterns. Reconstructing the sMCL with a semitendinosus autograft, left attached distally to its tibial insertion, would appear to have a minimal effect on length change compared to detaching it and using the native tibial attachment site. A POL graft must always be tensioned near extension to avoid capturing the knee or graft failure.

The analysis of foreign and domestic scientific publications of recent years, devoted to the problem of revision reconstructions of the anterior cruciate ligament of the knee joint in young and middle-aged patients with high functional demands. The key directions for improving the treatment of this category of patients have been determined. It was found that the main trend in the improvement of revision reconstructions of the anterior cruciate ligament of the knee in patients with high functional demands, which primarily include professional athletes and military personnel, is the desire for enhanced stabilization of the joint by eliminating residual, primarily rotational instability and increasing protection the main graft from high stress overload. Of particular importance is a strictly individual approach to the choice of the method of revision reconstruction of the anterior cruciate ligament, which makes it possible to implement the principles underlying the primary plastic of the ligament. The solution of these two problems requires, firstly, a more detailed examination of patients in order to identify factors of increased risk for the development of recurrent joint instability, which must be eliminated during surgical treatment. Secondly, the strict anatomical nature of restoration, and more often reconstruction, of the main and auxiliary functionally incompetent stabilizing structures of the joint against an unfavorable anatomical background caused by previous operations in the form of bone defects and deformities of the condyles with destruction of hyaline cartilage and previously resected menisci. Third, the use of reinforced grafts of increased strength for the reconstruction of the anterior cruciate ligament, as the main structure that stabilizes the joint. Moreover, such reinforcement can be direct, by strengthening the cruciate ligament graft directly, or indirectly, by strengthening the anterolateral part of the joint. The most appropriate is a combination of these two directions in order to obtain the maximum positive effect. Promising options for extra-articular reinforcement today are anatomical reconstruction of the anterolateral ligament and lateral extra-articular tenodesis of the iliotibial tract as part of the anterolateral joint complex. This makes it possible to compensate for the forced resections of the menisci and, without correction, at least at the first revision, the increased posterior inclination of the articular surface of the tibial condyles. The main advantages of these operations in combination with the reconstruction of the anterior cruciate ligament are their proven efficiency, versatility, technical simplicity and availability, which are of particular importance for the introduction into wide clinical practice of trauma departments of military hospitals.

The plantaris muscle is located in the posterior aspect of the superficial compartment of the lower leg, running from the lateral condyle of the femur to the calcaneal tuberosity. Classically, it is characterized by a small and fusiform muscle belly, which then changes into a long slender tendon. From the evolutionary point of view, the muscle is considered vestigial. However, it has recently been suspected of being a highly specialized sensory muscle because of its high density of muscle spindles. It has a noticeable tendency to vary in respect of both origin and insertion. Researchers have published many reports on the potential clinical significance of the muscle belly and tendon, including mid-portion Achilles tendinopathy, ‘tennis leg syndrome’, and popliteal artery entrapment syndrome. The right knee joint area was subjected to classical anatomical dissection, during which an atypical plantaris muscle was found and examined in detail. Accurate morphometric measurements were made. The muscle belly was assessed as bifurcated. Morphologically, superior and inferior parts were presented. There was a tendinous connection (named band A) with the iliotibial tract and an additional insertion (named band B) to the semimembranosus tendon. Both bands A and B presented very broad fan-shaped attachments. The human plantaris muscle is of considerable interest and has frequent morphological variations in its proximal part. Its specific characteristics can cause clinical problems and lead to confusion in diagnosis. More studies are needed to define its actual features and functions.

© 2020 Elsevier B.V. Background: Lateral approaches to total knee arthroplasty (TKA) provide good surgical exposure and may provide greater ease of soft tissue balancing in patients with a valgus deformity; however, little is known about the versatility in non-valgus knees. The present study evaluated if a lateral subvastus approach can achieve adequate surgical exposure while maintaining less soft tissue damage compared with the medial parapatellar approach in knees without any significant deformity. Methods: Using paired fresh-frozen cadaveric knees, the present study provides the first specimen-matched, side-by-side comparison of the lateral subvastus approach to the standard medial parapatellar approach to TKA. Ten knees were selected to undergo a lateral subvastus approach; the contralateral knee had a medial parapatellar approach as control. Incision length, surgical exposure and iatrogenic soft tissue damage were compared between the two approaches. Results: The lateral subvastus approach was successfully performed using an incision length that was not different from that used in the medial parapatellar approach (p > 0.05). The resultant surgical exposure was comparable between approaches (p > 0.05). The risk of the approach included tearing of the vastus lateralis fibers, and/or abrasion of the iliotibial tract/patellar ligament. Conclusions: The lateral subvastus approach to TKA provided a comparable method to the standard medial parapatellar approach. Despite adequate exposure, the approach did risk soft tissue injury. Caution needs to be exercised to reduce the risk of iatrogenic injury to the vastus lateralis and surrounding ligaments. The successful implementation in this cadaveric study substantiates the need for further consideration of this approach in clinical practice.

Iliotibial band syndrome or friction syndrome is an overuse disorder of the lateral knee. It is commonly reported in athletes, such as runners and cyclists, and refers to pain related to physical activity. The diagnosis is based on clinical history and physical assessment. Imaging, including ultrasound, is mainly performed in recurrent or refractory cases. The purpose of this paper is to review the etiology, diagnosis, and therapy of iliotibial band syndrome with a focus on ultrasound imaging and ultrasound-guided treatment. Ultrasound findings include soft-tissue edematous swelling or discrete fluid collection, suggestive of bursitis, between the iliotibial band and the lateral femoral epicondyle. The thickening of the iliotibial band has been inconsistently reported. Treatment varies according to the disease phase and, in the acute phase, consists of rest, physical therapy, and anti-inflammatory medications. Ultrasound-guided local steroid injections are effective in relieving symptoms.

Introduction. The modern development of technologies of ACL-R allows us to take a fresh look at the methods for recovery of anterior and rotational knee instability of the knee joint, which were used in the middle of the XX century. The objective was to evaluate the non-free tendon grafts while maintaining their anatomical attachment point for the isolated and complex ACL-R. Methods and materials. From 2014 to 2018, 128 patients were operated on the isolated ACL injuries (102 patients – 79.7 %) and complex ACL injuries (26 patients – 20.3 %). 26 (20.3 %) patients were operated on the rupture of a previously installed ACL graft. There were 72 men (56.3 %) and 56 women (43.7 %). The average age was (34.7±2.5) years. The average body weight was (82.7±1.6) kg; 24 (18.8 %) patients weighed over 85 kg. In 87 (68.0 %) cases, an anatomic single bundle ACL-R was performed by non-free graft either from the tendon of semitendinosus or in combination with the gracilis tendon. In 41 (32.0 %) cases, ACL-R was supplemented by LEAT (non-free iliotibial tract or free gracilis tendon grafts). The results were evaluated clinically, radiologically, and using the 2000 IKDC, KOSS and Lysholm Knee Scoring Scale integrated scales. In all cases, high stability of the knee joint was noted. Lachman and the pivot shift test recorded only 0 and 1 degrees. By the KOSS scale: «pain» was (86.7±2.3) points, «pathological symptoms» – (88.5±1.6) points, «daily activity» – (93.1±2.8) points, «sports activity» – (73.9±2.1) points, «quality of life» – (84.6±1.9) points. The average values of knee function by the Lysholm Knee Scoring Scale was 95.1±2.1. According to the 2000 IKDC, 117 (91.4 %) patients were included in group A, and 11 (8.6 %) in group B. Patients with moderate or severe impaired knee function (C and D) were not observed. The average time of the ACL-R was (82.1±2.4) min., ACL-R and LEAT – (94.7±6.9) min. The mean hospital stay was (3.2±1.8) days and (3.8±1.3) days, respectively. Conclusion. Non-free grafts for ACL-R and LEAT have an anatomically reliable fixation point, which allows to achieve high functional results of the knee joint. The proposed techniques can be reproduced with standard instruments and implants, taking into account the average operating time and blood loss, and without significant infection complications, persistent synovitis, contractures and hypotrophy of the thigh muscles.

ResumoUma fratura osteocondral desviada da tíbia anterolateral associada a avulsão da cabeça da fíbula em um paciente de 50 anos é relatada. A fratura avulsão do trato iliotibial em geral está associada lesões do ligamento cruzado, do menisco, e das estruturas laterais do joelho, como no caso em questão.

Introdução: No tratamento cirúrgico da lesão do ligamento cruzado anterior (LCA) em pacientes pediá-tricos, é necessário o equilíbrio entre a restauração da anatomia, e o risco de dano à fise de crescimento durante o ato operatório. Objetivo: Relatar caso de paciente com 9 anos, de-senvolvimento puberal de Tanner I, submetido a reconstrução do LCA pela técnica de Ko-cher, técnica de reconstrução extra fisária com enxerto de trato iliotibial autólogo.Palavras chave: Joelho, Reconstrução do ligamento cruzado anterior, Maturidade sexual AbstractIntroduction: In the surgical treatment of anterior cruciate ligament (ACL) injury in pediatric patients, a balance between anatomical restoration and the risk of damage to the growth plate during the surgery is necessary. Objective: Report a case of a 9-year-old patient, pubertal development of Tanner I, underwent ACL reconstruction using the technique of Kocher et al., a physeal-sparing reconstruction technique with autologous iliotibial tract graft.Keywords: Knee, Anterior cruciate ligament reconstruction, Sexual maturation

Theobjectivewas to compare the effectiveness of isolated anatomical antegrade reconstruction of the anterior cruciate ligament (ACL) with bonetendon-bone autograft (BTB autograft) and in combination with lateral extra-articular tenodesis (LEAT) graft from the iliotibial tract (ITT).Material and methods. We analyzed 187 arthroscopic ACL reconstructions in patients with a Pivot shift test – 3+ degree. We performed an isolated ACL-R in 118 (63.1 %) patients in group 1 and added the LEAT from ITB to it in group 2.Results. According to IKDC-2000: 176 (94.1 %) patients were included in categories A and B, 11 (5.9 %) – in C. Significant differences in these groups appeared 15 months after the operation. According to KOSS: in group 2, the anterior and rotational knee stability, as well as the level of sports activity were higher, and pathological symptoms were less common.Conclusion. LEAT from ITB increases stability and functionality of the knee joint in patients with anatomical antegrade ACL reconstructions with BTB-autograft for terms over 15 months after the operation, and is an economically procedure.

To reveal differences in the pattern of trabecular architecture in the epiphysis and metaphysis of the proximal tibia. The trabecular architecture of the proximal tibia was observed in 27 P45 plastinated knee specimens. In the medial and lateral condyles, under the articular cartilage surrounded by the medial or lateral meniscus, the cancellous bone is formed by thick and dense trabecular bands, which run longitudinally in the epiphysis and then pass through the epiphyseal line to terminate on the slanted cortex of the metaphysis. In the intercondylar eminence, the trabeculae are arranged basically in a network. In the central portion of the tibial metaphysis, cancellous bone consists of fine arcuate trabeculae, which extend to the anterior and posterior cortices, respectively. These trabeculae are intersected sparsely and form trusses over the medullary cavity. Near the areas of attachment of the iliotibial tract, tibial collateral ligament, anterior and posterior cruciate ligaments, and patellar ligament, the cancellous bone is locally reinforced with patchy trabeculae, dense radiating trabeculae, or two orthotropic trabecular bands. This study provides further accurate anatomical information on the trabeculae of the proximal tibia. The soft structures of knee joint, including the articular cartilage, menisci, and ligaments, and the slanted cortices of the metaphysis are important landmarks for the location of different arrangements of the cancellous architecture. The present results are beneficial for clinical diagnosis and treatment of pathologies of the knee joint, or the establishment of a finite element analysis model of the knee joint.

The tensor fascia lata muscle flap is a Mathes–Nahai type I (one single dominant pedicle). While this muscle flap can be used for a variety of reasons, we choose this flap mainly for three reasons: (a) to reconstruct groin or pelvic defects (including the area of the iliac wing) as a V–Y advancement flap or as a rotational flap, (b) as part of a chimeric free flap when a targeted muscle reinnervation is being performed, and (c) when a knee soft tissue reconstruction with a concurrent patellar tendon reconstruction is needed, as the iliotibial tract can be transformed into a relative strong tendinous structure. While the flap can be harvested as a muscular flap only, we almost always harvest it as a musculocutaneous flap, with the skin overlying the muscle in the lateral aspect of the leg. Two-thirds of the proximal skin from the anterior superior iliac spine (ASIS) to the knee can be safely harvested without concerns; however, an extended skin paddle can also be harvested. If the skin paddle harvest extends distally to the proximal two-thirds, then one needs to understand that the blood supply to the distal aspect is often unreliable. As a result, a delay procedure is recommended in these cases. The skin paddle design can be made in a V or a more circular pattern depending on the reconstructive needs and the shape of the wound that needs to be covered. It needs to be noted that the muscle, even though small, is significantly bulky and that needs to be taken into account when deciding the suitability of the flap for the proposed reconstruction. The vascular pedicle anatomy is consistent with adequate length (6 cm) and good diameter (2 mm), making it an easy target for microvascular anastomosis. The functional donor site defect morbidity is minimal; however, it can leave a significant cosmetic defect, which needs to be discussed, especially with female patients.

The bony structures of knee joint are composed of femur, tibia, fibula, and patella. The bony structures are connected with surrounding soft tissues, such as ligaments, tendons, and capsular structures. The quadriceps and patella tendon are located in the anterior aspect of the knee joint. In the posteromedial aspect of the knee the medial hamstring tendons are observed. The iliotibial tract and biceps femoris are placed in the posterolateral aspect of the knee joint. The medial collateral ligament is a flat band-like structure attached to the medial epicondyle of the knee and to the medial metaphysis of the proximal tibia. The lateral collateral ligament is a cord like structure connecting the lateral femoral epicondyle to the fibula head. The menisci are a crescent shaped fibrocartilaginous structures placed between the distal femur and the tibial plateau. The cruciate ligaments are intraarticular, extrasynovial structures connecting the femur and the tibia. The knee joint is supplied blood from branches of the femoral and the popliteal artery. The nerve distribution to the knee joint is made by the branches of the femoral nerve, tibial nerve, common peroneal nerve, and obturator nerve. The knee joint is a modified hinge joint and can be moved in 6 directions, but the main movement is a flexion-extension. A combination of rolling and gliding movement of the femur against the tibial articular surface enables a maximum flexion of the knee joint. The tibia is externally rotated about 15 degrees during full extension of the knee joint. This rotational motion is called a screw-home movement. In the patellofemoral joint movement, the patella contacts the trochlea in a 30 degrees flexion, and the contact surface moves proximal as the flexion progresses.

Fascia is a fibrous connective tissue present all over the body. At the lower limb level, the deep fascia that is overlying muscles of the outer thigh and sheathing them (fascia lata) is involved in various pathologies. However, the understanding and quantification of the mechanisms involved in these sheathing effects are still unclear. The aim of this study is to observe and quantify the strain field of the fascia lata, including the iliotibial tract (ITT), during a passive movement of the knee. Three fresh postmortem human subjects were studied. To measure hip and knee angles during knee flexionextension, passivemovements from 0° to around 120° were recorded with amotion analysis systemand strain fields of the fascia were acquired using digital image correlation. Strains were computed for three areas of the fascia lata: anterior fascia, lateral fascia, and ITT. Mean principal strains showed different strain mechanisms depending on location on the fascia and knee angle. For the ITT, two strain mechanisms were observed depending on knee movement: compression is observed when the knee is extended relative to the reference position of 47°, however, tension and pure shear can be observed when the knee is flexed. For the anterior and lateral fascia, in most cases, minor strain is higher than major strain in absolute value, suggesting high tissue compression probably due tomicrostructural fiber rearrangements. This in situ study is the first attempt to quantify the superficial strain field of fascia lata during passive leg movement. The study presents some limitations but provides a step in nderstanding strain mechanism of the fascia lata during passive knee movement.

The purpose of this study was to investigate if the anterolateral ligament of the knee (ALL) is present in the human fetus and describe its topography along with other structures of the region. Forty human fetuses knee joints, at mean age 34 weeks (± 2.57 weeks), fixed in 10% formalin, were submitted to cross-sectional dissection and mesoscopic analysis. The ALL was not identified, although the usual topography of the region was identified in all specimens: skin, subcutaneous tissue, iliotibial tract (ITT), fibular collateral ligament, popliteal muscle tendon, lateral meniscus, patellar ligament, infrapatellar fat pad, lateral patellar retinaculum, knee joint capsule, lateral inferior genicular vessels, and the biceps femoris tendon. The ITT reveals anterior (n = 12) and lateral thickening (n = 17) in some specimens. This thickening was found in both knees of the same subject in 6/20 specimens. The anterolateral ligament of the knee is not a congenital or solid structure. Our results suggest that the ALL may be a deep layer of the ITT or part of the knee joint capsule, or its identification is evaluator dependent.

Fascia is a fibrous connective tissue present all over the body. At the lower limb level, the deep fascia that is overlying muscles of the outer thigh and sheathing them (fascia lata) is involved in various pathologies. However, the understanding and quantification of the mechanisms involved in these sheathing effects are still unclear. The aim of this study is to observe and quantify the strain field of the fascia lata, including the iliotibial tract (ITT), during a passive movement of the knee. Three fresh postmortem human subjects were studied. To measure hip and knee angles during knee flexion-extension, passive movements from 0° to around 120° were recorded with a motion analysis system and strain fields of the fascia were acquired using digital image correlation. Strains were computed for three areas of the fascia lata: anterior fascia, lateral fascia, and ITT. Mean principal strains showed different strain mechanisms depending on location on the fascia and knee angle. For anterior and lateral fascia, a tension mechanism was mainly observed with major strain greater than minor strain in absolute value. While for the ITT, two strain mechanisms were observed depending on knee movement: tension is observed when the knee is extended relatively to reference position of 47°, however, pure shear can be observed when the knee is flexed. In some cases, minor strain can also be higher than major strain in absolute value, suggesting high tissue compression probably due to microstructural fiber rearrangements. This in situ study is the first attempt to quantify the superficial strain field of fascia lata during passive leg movement. The study presents some limitations but provides a step in understanding strain mechanism of the fascia lata during passive knee movement.

Objectives To test the hypothesis that Iliotibial Band Syndrome (ITBS) is caused by excessive iliotibial band (ITB) tension, promoted by hip abductor and external rotator weakness, and evaluate the influence of 6 weeks of physiotherapy on ITB stiffness. Design Interventional study with control group. Setting Clinical. Participants 14 recreational runners with ITBS and 14 healthy controls of both sexes. Main outcome measures Ultrasound shear wave elastography, hip muscle strength, visual analog scale pain, subjective lower extremity function. Results No statistical differences in ITB tension between legs as well as between patients suffering from ITBS and healthy controls were detected. Results showed significant strength deficits in hip abduction, adduction as well as external and internal rotation. Following six weeks of physiotherapy, hip muscle strength (all directions but abduction), pain and lower extremity function were significantly improved. ITB stiffness, however, was found to be increased compared to baseline measurements. Conclusion Shear wave elastography data suggest that ITB tension is not increased in the affected legs of runners with ITBS compared to the healthy leg or a physical active control group, respectively. Current approaches to the conservative management of ITBS appear ineffective in lowering ITB tone.

Purpose The visualization of potentially injured anatomical structures is crucial. Lately the anterolateral ligament (ALL) and the deep structures of the iliotibial tract (ITT) have been of increased clinical interest because of their role as important lateral stabilizers of the knee. The aim of this study was to assess the visibility of the ALL and the deep structures of the ITT using MRI. Good intra- and inter-observer reproducibility was hypothesized. Methods Knee MRI data from patients without ligamentous lesions were retrospectively analyzed by two radiologists at two time points using axial and coronal sequences. The visibility of the different parts of the ALL (femoral, meniscal and tibial part) and of the deep ITT, namely the deep attachments of the ITT to the distal femur and capsulo-osseous layer of the ITT, were determined on a binary (yes/no) basis. Results Seventy-one cases (42 men, 29 women) were studied. Inter-observer agreement was high. Cohen’s kappa was 0.97 for the tibial part of the ALL and 0.76 for the femoral part. For the deep attachments of the ITT to the distal femur Cohen’s kappa was 0.94. For each of the investigated parameters absolute agreement between the observers was at least 88%. Regarding intra-observer agreement Cohen’s kappa was 0.62 for the femoral part of the ALL and 0.85 for the tibial part of the ALL. For the deep attachments of the ITT to the distal femur Cohen’s kappa was 0.94. For each investigated parameter absolute agreement between the two time points was at least 83%. Conclusions The presence of the anterolateral structures of the knee can be determined with substantial inter- and intra-observer agreement using MRI examination. This is applicable for both the ALL and the deep ITT. Level of evidence Diagnostic study – Level III.

The latest procedural statistics from the American Society of Plastic Surgeons rank liposuction as the second most common aesthetic surgical procedure performed by board certified plastic surgeons. In the author’s experience, 40% of liposuction cases involve the extremities and the great majority of these cases are carried out on female patients. Individuals who are close to their ideal body weight and have a disproportionately high distribution of fat in the lower extremities in relation to their trunk are still the best candidates for thigh liposuction. Poor patient selection and overextraction resulting in excessive skin laxity and contour deformities are the most common causes of inferior aesthetic results following contouring of the thighs. There are five zones of adherence in the thighs and these are areas that should be avoided during liposuction procedures: (1) the gluteal crease, (2) the posterior distal thigh above the popliteal crease, (3) the lower lateral thigh area of the iliotibial tract, (4) the lateral gluteal depression, and (5) the mid-medial thigh area. The author’s approach to thigh contouring involves the use of VASER-assisted liposuction since it is associated with less blood loss, good skin retraction, and a relatively comfortable postoperative course for the patient. Patients with significant skin laxity are best treated with thighplasty or VASER-assisted thighplasty depending on the degree of lipodystrophy present. Preoperative planning of upper extremity contouring involves a comparison of the relationship between the excess arm fat and the skin envelope of the arm. In cases of arm lipodystrophy with good skin tone, VASER-assisted liposuction allows for easier fat extraction with good skin retraction. Poor skin tone, regardless of the amount of arm fat, usually dictates that an open tightening procedure be performed in order to properly contour the arm. Patients with poor skin tone and a significant amount of excess arm fat are best treated by a VASER-assisted brachioplasty.

Although the number of Ultrasound (US) imaging studies investigating the fascial layers are becoming more numerous, the majority tend to use different reference points and terminology to describe their findings. The current work set out to compare macroscopic and microscopic data of specimens of the fascial layers of the thigh with US imaging findings. Specimens of the different fascial layers of various regions of the thigh were collected for macroscopic and histological analyses from three fresh cadavers and compared with in vivo US images of the thighs of 20 healthy volunteers. The specimens showed that the subcutaneous tissue of the thigh is made up of three layers: a superficial adipose layer, a membranous layer/superficial fascia, and a deep adipose layer. The deep fascia is composed of an aponeurotic fascia, which envelops all the thigh muscles and is laterally reinforced by the iliotibial tract and an epimysial fascia, which is specific for each muscle. The morphometric measurements of the thickness of the superficial fascia were different (anterior: 153.2 ± 39.3 µm; medial: 128.4 ± 24.7 µm; lateral: 154 ± 28.9 µm; and posterior: 148.8 ± 33.2 µm) as were those of the deep fascia (anterior: 556.8 ± 176.2 µm; medial: 820.4 ± 201 µm; lateral: 1112 ± 237.9 µm; and posterior: 730.4 ± 186.5 µm). The US scans showed a clear picture of the superficial adipose tissue, the superficial fascia, and the deep adipose tissue, as well as the deep fasciae. The epimysial and aponeurotic fasciae of only some topographic areas could be independently identified. The US imaging findings confirmed that the superficial and deep fascia have different thicknesses, and they showed that the US measurements were always larger with respect to those produced by histological analysis (p

Case We present an 18-year-old man with poor alignment of the lower limbs, marked by congenital dislocation of the left patella, with gait impairment, and an associated 20° flexion contracture. Surgical treatment was performed with a single complex procedure with the release of the lateral retinaculum, capsule, and iliotibial tract, followed by a subtraction trochleoplasty, tibial tubercle transfer, elongation of the quadriceps tendon, and anatomical reconstruction of the medial patellofemoral ligament. At the 5-year follow-up, the patient had a significant improvement in gait pattern, with the patella centered on the new trochlear groove without any signs of patellar instability. Conclusions The approach of congenital dislocation of the patella is controversial, and although numerous procedures have been described in children, the approach in adults should be individually tailored. In this case, trochlear deepening and preserving the trochlear cartilage proved to be an effective option for treating a congenital dislocation.

The objectives of this work was to conduct a comprehensive state-of-the art review of the current literature to identify any gaps or discrepancies and summarize the main challenges for obtaining a homogeneous evaluation of muscular fascia in healthy individuals. An electronic document search using key words and MeSH terms was performed with various databases. Two independent investigators were tasked with the screening of articles and data extraction. A critical appraisal of what is known was then conducted. The literature search identified 65 articles related to healthy facia in the various databases consulted and 20 articles were kept for the review. The thickest portion of the fascia lata (the iliotibial tract) and the plantar fascia are the most often studied muscular fasciae whereas there is paucity of studies on fascia related to other muscles in the body. US imaging is suitable to complement physical examination and for evaluating treatment outcomes. However, the small number of studies and the heterogeneity of the methods did not allow us to establish normal reference values for muscular fascia thickness and to provide strong recommendations about measurement protocols.

To investigate iliotibial band (ITB) diameter thickness at the greater trochanter in patients requiring iliotibial band release who have failed conservative modalities, in comparison to an asymptomatic patient population. A total of 68 subjects were selected to be reviewed using T2 axial plane MRI. The ITB diameter thickness was measured in 34 subjects who underwent surgical ITB release, and compared with a match-paired asymptomatic hip cohort consisting of 34 subjects. ITB diameter thickness was measured at the thickest location for each subject twice by two different examiners. Inter/intra class correlation coefficient was determined for ITB measurement technique accuracy, and the presence of recalcitrant proximal hip pain was evaluated. Interclass correlation coefficient with 95% confidence was measured to be 0.953. The average thickness for ITB surgical release subjects was measured to be 5.61 ± 2.10 mm, and for asymptomatic subjects 3.77 ± 0.79 mm (P

Introduction. Congenital contracture of the iliotibial tract is a rather rare pathology that causes difficulties in diagnosing and planning treatment activities. The lack of a clear idea of the causes of the disease has led to disagreement in the interpretation of the diagnosis in patients with this pathology. In the Russian-language literature, this disease is referred to as idiopathic extension and abduction contracture of a hip joint or idiopathic contracture of the dorsal gluteal muscle (a congenital contracture of the tendons of the dorsal gluteal muscles), whereas the English-language literature more often highlights congenital or idiopathic contracture of the dorsal gluteal muscles. Clinical сase. The results of treatment of a 6-year-old child with congenital contracture of the iliotibial tract is presented. The child exhibited lameness when walking first started, but the correct diagnosis was not established. Clinically, along with the limitation of adduction and extension in the hip joint and an induration of the soft tissue along the external surface of the right thigh, the pelvis was skewed, and there was shortening of the right lower limb and a valgus deformity of diaphysis of the right femoral bone. Ultrasonographic and magnetic resonance imaging indicated the presence of a fibrous bridle over the outer surface of the right thigh. The fibrous bridle was excised for 15 cm, and a temporary hemiepiphysiodesis of the medial portion of the distal growth zone of the right femur was performed. Results and discussion. At the 1-year control examination, the patient did not present any complaints. There was no relapse of the contracture. According to X-ray study results, correction of the valgus deformity of the right femur was achieved, and the metal structures were removed. Despite the more frequent extension and abduction direction of the contracture of the iliotibial tract indicated by most authors, the direction and severity apparently may depend on the predominant zone of fibrous degeneration of the muscle groups. Additionally, with the predominant lesion of the dorsal gluteal muscle, a more pronounced extension component can be expected, whereas with the predominant lesion of the musculus tensor fasciae latae, a flexion component can be expected and was observed in our patient.

Reconstruction is challenging in a patient with loss of a segment of Achilles tendon and infection in the overlying soft tissue. Here the authors describe one-stage tendon reconstruction, using an anterolateral thigh free flap incorporating a vascularized muscle flap and a strip of iliotibial tract in a patient with re-rupture of an Achilles tendon and soft tissue infection. Postoperative immobilization of the affected ankle using an external fixator enabled us to observe the flap directly and reduce pressure on the flap. The patient had a successful outcome, with no difficulty in walking, running, or climbing stairs and no limitation of range of motion at the ankle joint postoperatively. This is a promising technique for reconstruction of the Achilles tendon and treatment of infection as a one-step procedure.

Objective Snapping of the iliotibial band over the greater trochanter should be eliminated by reducing tension via lengthening, release, and incision of the iliotibial band. Indications Positive clinical examination and painful snapping of the iliotibial band over the greater trochanter, despite extensive conservative treatments, for over 6 months. Contraindications Weakness of the abductor muscles with positive Trendelenburg sign. Surgical technique Direct approach to the iliotibial tract. The snapping of the tract over the greater trochanter can be provoked and observed in situ via internal rotation and adduction of the hip. Lengthening of the iliotibial band is performed with a tongue-shape flap technique ("Griffelschachtelplastik") directly over the greater trochanter. This leads to simultaneous release and incision over the greater trochanter. Hereafter, no snapping of the tract should be observed upon motion analysis. Postoperative management Pain-adapted mobilization with full weightbearing, no active abduction against resistance, and no adduction over and exceeding the 0‑degree level for 6 weeks. Results The snapping of the iliotibial band could be eliminated in all cases. Apart from 2 patients with previous surgery who still complain of unimproved pain, improvement of symptoms with consequent subjective satisfaction with the outcome of surgery was reported in all cases.

Patients who present for anterior cruciate ligament (ACL) revision with a high-grade pivot shift at the time of an index ACL revision procedure and subsequent reconstruction failure or a high-grade pivot shift at revision surgery, patients with generalized joint laxity, and those requiring softs tissue grafts should be considered candidates for lateral tenodesis to supplement intraarticular graft revision. Although there is no consensus regarding the optimal lateral tenodesis technique, due to the tibial positioning associated with tensioning and fixation of extra-articular procedures, a lateral tenodesis should not be used in patients with posterolateral corner injuries or lateral compartment articular disease.

The human gluteus maximus muscle (GMX) is characterised by its insertion to the iliotibial tract (a lateral thick fascia of the thigh beneath the fascia lata), which plays a critical role in lateral stabilisation of the hip joint during walking. In contrast, in non-human primates, the GMX and biceps femoris muscle provide a flexor complex. According to our observations of 15 human embryos and 11 foetuses at 7-10 weeks of gestation (21-55 mm), the GMX anlage was divided into 1) a superior part that developed earlier and 2) a small inferior part that developed later. The latter was adjacent to, or even continuous with, the biceps femoris. At 8 weeks, both parts inserted into the femur, possibly the future gluteal tuberosity. However, depending on traction by the developing inferior part as well as pressure from the developing major trochanter of the femur, most of the original femoral insertion of the GMX appeared to be detached from the femur. Therefore, at 9-10 weeks, the GMX had a digastric muscle-like appearance with an intermediate band connecting the major superior part to the small inferior mass. This band, most likely corresponding to the initial iliotibial tract, extended laterally and distally far from the muscle fibres. The fascia lata was still thin and the tensor fasciae latae seemed to develop much later. It seems likely that the evolutionary transition from quadripedality to bipedality and a permanently upright posture would require the development of a new GMX complex with the iliotibial tract that differs from that in non-human primates. (Folia Morphol 2018; 77, 1: 144-150).

This article describes the complex anatomic structures that pass across the lateral aspect of the knee, particularly the iliotibial tract and the underlying anterolateral ligament and capsule. It provides data on their strength and roles in controlling tibiofemoral joint laxity and stability. These findings are discussed in relation to surgery to repair or reconstruct the anatomic structures, or to create tenodeses with similar effect.

This Article contains errors. The determined values of the Young's moduli deviate from the literature by about two orders of magnitude. Due to the recalculation, the values of the determined Young's moduli in Figure 7B are incorrect. The correct Figure 7B appears below as Figure 1. In addition, a new table is included with each calculated Young's modulus for better transparency. The calculated Young's moduli are listed in Table 1 below. As a result of this error, Table 2 is incorrect. The correct Table 2 appears below. In the Results section, ""A slight increase in the Young's Modulus of FDF0 samples (0.91 (SD 0.29) MPa) and FDF1 samples (0.83 (SD 0.28) MPa), compared to F samples (0.73 (SD 0.44) MPa) has been observed (Fig. 7)."" should read: "A slight increase in the Young's Moduli of FDF0 samples (274.46 (SD 115.60) MPa) and FDF1 samples (252.26 (SD 83.16) MPa), compared to F samples (247.73 (SD 167.91) MPa) has been observed (Fig. 7)." Finally, the Acknowledgements section is incomplete. "We acknowledge support from the German Research Foundation (DFG) and Leipzig University within the program of Open Access Publishing." should read: "We acknowledge support from the German Research Foundation (DFG) and Leipzig University within the program of Open Access Publishing. Additionally, the authors would like to thank Matthias Oehme and especially PD Dr. Hanno Steinke for their support in managing the cadaver acquisition."

Background Anterior skull base reconstruction after resection of sinonasal cancers may be challenging when pedicled flaps are unavailable. The purpose of the present study was to analyze the complication rate and donor site morbidity of 3-layer reconstruction with the iliotibial tract (ITT). Methods We retrospectively reviewed all anterior skull base reconstructions with ITT performed from 2007 to 2015. Donor site morbidity was investigated by a dedicated questionnaire. Factors impacting on cerebrospinal fluid (CSF) leak were assessed using the Fisher's exact test. Results One hundred eighty-six patients were included. The overall complication rate was 9.7%. A CSF leak occurred in 11 patients (5.8%). Twenty patients (10.8%) and 130 patients (69.9%) underwent previous or adjuvant radiotherapy, respectively. Neither radio(chemo)therapy nor age impacted the risk of CSF leak. Six patients (3.2%) experienced complications at the donor site. The questionnaire demonstrated minimal functional and aesthetic morbidity. Conclusion Three-layer reconstruction with the ITT is a safe procedure with acceptable complication rate and donor site morbidity.

The anatomy of the lateral compartment of the knee is very complex, rich in different structures, and difficult to fully understand. Magnetic resonance imaging is the examination of choice for the diagnosis of musculoskeletal pathologies. This article reviews the historical perspectives and the normal and pathologic aspects of the anterolateral complex of the knee, consisting of the iliotibial tract, the lateral collateral ligament, the biceps tendon, and the anterolateral ligament, including the causative structures of the Segond fracture.

Recent research, focusing on rotatory knee laxity, has intrigued the whole orthopaedic knee community. First popularized by Hughston et al, peripheral knee injuries at the time of cruciate ligament rupture have regained more and more recognition, which has led to a better understanding of these injuries. Recent research has been focused on anterolateral rotatory instability, especially regarding those structures that are responsible for the high-grade anterior subluxation of the lateral tibial plateau when damaged. Work at Imperial College London showed that the iliotibial tract (ITT) was the primary restraint to internal tibial rotation, especially the capsulo-osseous layer of the ITT, which contributed almost 25% of controlling a 5-Nm internal rotation torque at early flexion angles. However, due to the complex fiber arrangement, the functional anatomy of the ITT is difficult to understand. Thus, this article focuses on the involvement of the internal tibial rotation in restraining internal rotation and the pivot-shift phenomenon.

Objective: To verify the incidence and characterize morphologically the anterolateral ligament of the knee (ALL) in cadaveric samples of the collection of the Laboratory of Anatomy of the Department of Morphology of the Universidade Federal do Espírito Santo. Methods: Dissections and cross sections were performed for mesoscopic analysis of the anterolateral region of 15 knees preserved in 4% formalin solution in order to identify the ALL. Results: After dissection of the skin and subcutaneous tissue of the knee anterolateral region, it was possible to identify the iliotibial tract (ITT), the patellar ligament and the femoral biceps tendon. The ITT was removed from the Gerdy tubercle and the following structures were visualized: knee joint capsule, fibular collateral ligament and popliteal tendon. However, the ALL was not identified in any of the samples. Conclusions: The ALL could not be identified in any of the specimens studied, either through dissection or mesoscopic analysis. Level of Evidence III, Diagnosis Studies - Investigation of an Exam for Diagnosis. RESUMO Objetivo: Verificar a incidência e possivelmente caracterizar morfologicamente o ligamento anterolateral do joelho (LAL) em amostras cadavéricas do acervo do Laboratório de Anatomia do Departamento de Morfologia da Universidade Federal do Espírito Santo. Métodos: Foram realizadas dissecações e secções transversais para análise mesoscópica da região anterolateral de 15 joelhos conservados em solução de formalina a 4% a fim de identificar o LAL. Resultados: Após a dissecação da pele e da tela subcutânea da região anterolateral dos joelhos foi possível identificar o trato iliotibial (TIT), o ligamento patelar e o tendão do músculo bíceps femoral. Após a desinserção do TIT no tubérculo de Gerdy as seguintes estruturas foram visualizadas: cápsula articular do joelho, o ligamento colateral fibular e o tendão do músculo poplíteo. Entretanto, o LAL não foi identificado em nenhuma das amostras. Conclusões: O LAL não pôde ser identificado em nenhum dos espécimes estudados, seja através da dissecação ou da análise mesoscópica. Nível de Evidência III, Estudos Diagnósticos - Investigação de um Exame para Diagnóstico.

Purpose The purpose of this study was to evaluate the separate contribution of the two definitions of the anterolateral ligament (ALL), the mid-third lateral capsular ligament (MTLCL) and deep capsule-osseous layer of the iliotibial tract (dcITT) in addition to the superficial iliotibial tract (sITT) to the control of tibial motion with respect to the femur during the application of force/torque seen during the three tests of the standard clinical knee examination (AP Lachman test, tibial axial rotation test and varus–valgus stress test). Methods Six pelvis-to-toe cadaveric specimens were examined using an automated testing device that carried out the three components of the clinical knee examination. Internal/external rotation torque, anteroposterior load and adduction/abduction torque were applied, while torque/force and positional measurements were recorded. Sequential sectioning of the structures followed the same order for each knee, sITT, dcITT and MTLCL. Testing was repeated after release of each structure. Results During the tibial axial rotation test, releasing the sITT caused an increase in internal rotation of 2.6° (1.4–4.1°, p

Because reconstruction of the anterior cruciate ligament (ACL) in a double-bundle technique did not solve the problem of persistent rotatory laxity after surgery, new potential answers to this issue are of great interest. One of these is an extraarticular stabilization based on the rediscovery of the anterolateral ligament (ALL). Knowledge about its biomechanical function and benchmark data for an optimal reconstruction remain lacking. Therefore, the purpose of this study was to assess the function of the ALL under passive motion, anterior tibial translation and tibial rotational moments. Continuous passive motion (0°–120° flexion), ap-translation and static pivot shift tests were performed on eight cadaveric knees. The knees were measured in intact, ACL-resected (ACLres) and ACL + ALL-resected (ALLres) conditions. Ap-translation and static pivot shift under 134 N anterior shear load were determined at 0°, 30°, 60° and 90° flexion. Strain of the ALL was recorded in intact and ACLres conditions. During continuous passive motion under unloaded conditions, no significant difference in internal rotation between ACLres and ALLres was observed. With an additional internal tibial torque of 1–4 Nm, internal rotation increased significantly between 60° and 120° after resection of the ALL (p ≤ 0.05). Anterior tibial translation was significantly higher at 30° in ALLres (p = 0.01) and for a simulated pivot shift at 60° and 90° in ACLres (p ≤ 0.01). The ALL was not strained under unloaded passive motion. Adding different internal tibial torques led to strain starting at 60° flexion (1 N m internal torque) and 15° flexion (4 N m internal torque) in intact ligaments. In ACLres, significantly greater ALL strains under lower flexion angles were seen for each condition (p ≤ 0.05). This study demonstrated the ALL to be without function under passive motion and with no influence on tibial rotation. On application of extrinsic loads, the ALL had a low but significant stabilizing effect against anterior tibial shear load at low flexion angles. For this reason, it can be concluded that the ALL is supporting the ACL against internal tibial loads to a minor degree. A relationship between the ALL and the pivot shift cannot be concluded. With these results ALL-reconstruction cannot be recommended at the moment without further biomechanical investigations.

The anterolateral thigh (ALT) compartment has four anatomical limits: the rectus femoral muscle medially, the iliotibial tract laterally, the anterior superior iliac spine (ASIS) inferiorly, and the lateral femoral condyle inferiorly. A superficial fascia, with subcutaneous tissue, covers the entire muscular structure. The deepest fascia in the lateral part is formed by the tensor muscle of the fascia lata connected with the fascia lata to compose the iliotibial band, which provides stability in the knee joint.

OBJECTIVES To assess the learning curve of the direct superior approach (DSA) for total hip arthroplasty (THA) and to compare surgical, clinical, and radiological results with a matched control group using the mini posterior approach (MPA). METHODS A prospective cohort study was performed from October 2016 to May 2017 including our first 52 patients undergoing THA using the DSA. Patients with primary osteoarthritis or osteonecrosis and a body mass index (BMI)

The present study aimed to examine the pathologic changes of the iliotibial tract and discusses its relationship with gluteal muscle contracture. Samples of contractual iliotibial tracts were collected from six patients with contractures of the gluteal muscles and iliotibial tracts during their surgical treatment. Samples of normal iliotibial tracts were collected from six patients receiving surgeries for avascular necrosis of the femoral head who had no contractures of the gluteal muscles and iliotibial tracts. The tissue samples were stained using Hematoxylin and Eosin (H&E), Masson’s trichrome, and Sirius Red. The mRNA and protein levels of various tissue repair genes were determined using quantitative real-time PCR and Western blotting. Both the normal and contractual iliotibial tracts consisted of type I and III collagens. The contractual iliotibial tracts had a significantly higher proportion of type III collagen in comparison with the normal iliotibial tracts. The mRNA expression levels and protein levels of tissue repair genes TGFβ 1, bFGF, and matrix metalloproteinase-1 (MMP-1) in the contractual iliotibial tracts were up-regulated in comparison with that in the normal iliotibial tracts. However, the mRNA expression levels and protein levels of tissue inhibitors of metalloproteinase-1 (TIMP) in the contractual iliotibial tracts were down-regulated in comparison with that in the normal iliotibial tracts. The contractures of both the gluteal muscles and the iliotibial tracts share similar histology and molecular pathology. Our results indicate that iliotibial tract contracture is secondary to the gluteal muscle contracture and is a constant tissue repair process.

PURPOSE: To compare knee kinematics before and after anterior cruciate ligament ACL reconstruction (ACL-R) using hamstring graft (HG) and a double-stranded iliotibial tract graft attached to Gerdy's tubercle (providing an extra-articular anterolateral tenodesis) (named the modified iliotibial tract graft = MIT). METHOD: Eighteen cadaveric knees were tested in a 6 degree of freedom kinematics rig. An optical tracking system recorded kinematics of the knee from 0 to 80 degrees of flexion applying no load, internal/external rotation (IR/ER), valgus/varus rotation (VGR/VRR), simulated pivot shift (SPS), anterior translation (AT) and posterior translation loads. The knee was tested before and after resection of the ACL and the anterolateral ligament (ALL), respectively; then after HG-ACL-R and MIT-ACL-R. Grafts were fixed at 20° of flexion. Results were compared to the intact knee. RESULTS: ACL resection resulted in a significant increase in AT (p

Background: Greater trochanteric pain syndrome (GTPS) is a clinical diagnosis with the typical presentation of chronic intermittent lateral hip/thigh/buttock pain, aggravated with activity and when lying on the affected side. There is a lack of valid/specific diagnostic criteria for GTPS. GTPS can be attributed to a multitude of causes ranging from tendinopathy and/or rupture of the gluteal tendons and/or bursitis, to pathological alterations of the iliotibial band/fascia lata and other nearby anatomical structures located on the lateral part of the hip. To further complicate the diagnostic process, according to different studies, the prevalence of GTPS in adults with lower back pain has been found to be between 20-30%. Alterations of the lumbar biomechanics may interfere in the range of internal rotation of the hip and consequently produce a GTPS and vice versa. Changes in hip range of motion will trigger changes in the dynamics of lower extremities and the spine. Generalized myofascial pain can also be a source of confusion when evaluating patients with GTPS. Objectives: Understand the clinical anatomy of the lateral hip. Interpret the US images of the lateral hip Identify potential pain generators of the lateral hip. Methods: The study of the static and dynamic sonoanatomy of the different components of the lateral region of the hip can contribute in a relevant way to clarify the diagnosis In the eular guidelines of sonographic musculoskeletal (MSUS) exam published in 2017, the sonographic exam of the lateral hip has been developed in detail and will be discussed during this lecture. The anatomy against what is often thought is not stagnant knowledge but evolves over the years providing new and useful data applicable in daily clinical practice. The anatomy, both static and dynamic, of the trochanteric region, is complex. For example, the subgluteus maximus bursa, which is frequently incriminated in the GTPS, is located in the posterior facet of the greater trochanter and is related to the iliotibial tract, the fascial contributions of the gluteus maximus and the tensor of the fascia lata muscle to the iliotibial tract and the origin of the vastus lateralis. In order to understand the multifunction and relationships of the different structures of this region means one has to have seen images of them and for that purpose, the human cadaveric dissection is the best tool. Thanks to the fact that the speaker is involved as a professor in the anatomy department at the University of Barcelona, Bellvitge campus, directed by prof M Miguel, the clinical anatomy part will be developed with real dissections made specifically for this lecture. Results: Conclusion: Knowledge of the clinical anatomy needed to understand the relationships between the different structures, the clinical history, and physical examination of GTPS patients and the therapeutic possibilities including ultrasound-guided injections are other steps that lead to an accurate diagnosis of GTPS. References: [1] anatomy and anthropology: Maribel Miguel, Mike Benjamin [2] Clinical anatomy: Juan Canoso [3] Regional musculoskeletal ultrasound: Carlo Martinoli [4] Moller I, Bong D. Ultrasound-guided interventions in the hip joint. TechniquesIn Regional Anesthesia and PainManagement 2013; 17: 140–149 [5] Moller I, Janta I, Backhaus M, et al The 2017 EULAR standardized procedures for ultrasound imaging in rheumatology. [6] Annals of the Rheumatic Diseases 2017;76:1974-1979. Disclosure of Interests: None declared

Background: Greater trochanteric pain syndrome (GTPS) is a clinical diagnosis with the typical presentation of chronic intermittent lateral hip/thigh/buttock pain, aggravated with activity and when lying on the affected side. There is a lack of valid/specific diagnostic criteria for GTPS. GTPS can be attributed to a multitude of causes ranging from tendinopathy and/or rupture of the gluteal tendons and/or bursitis, to pathological alterations of the iliotibial band/fascia lata and other nearby anatomical structures located on the lateral part of the hip. To further complicate the diagnostic process, according to different studies, the prevalence of GTPS in adults with lower back pain has been found to be between 20-30%. Alterations of the lumbar biomechanics may interfere in the range of internal rotation of the hip and consequently produce a GTPS and vice versa. Changes in hip range of motion will trigger changes in the dynamics of lower extremities and the spine. Generalized myofascial pain can also be a source of confusion when evaluating patients with GTPS. Objectives: Understand the clinical anatomy of the lateral hip. Interpret the US images of the lateral hip Identify potential pain generators of the lateral hip. Methods: The study of the static and dynamic sonoanatomy of the different components of the lateral region of the hip can contribute in a relevant way to clarify the diagnosis In the eular guidelines of sonographic musculoskeletal (MSUS) exam published in 2017, the sonographic exam of the lateral hip has been developed in detail and will be discussed during this lecture. The anatomy against what is often thought is not stagnant knowledge but evolves over the years providing new and useful data applicable in daily clinical practice. The anatomy, both static and dynamic, of the trochanteric region, is complex. For example, the subgluteus maximus bursa, which is frequently incriminated in the GTPS, is located in the posterior facet of the greater trochanter and is related to the iliotibial tract, the fascial contributions of the gluteus maximus and the tensor of the fascia lata muscle to the iliotibial tract and the origin of the vastus lateralis. In order to understand the multifunction and relationships of the different structures of this region means one has to have seen images of them and for that purpose, the human cadaveric dissection is the best tool. Thanks to the fact that the speaker is involved as a professor in the anatomy department at the University of Barcelona, Bellvitge campus, directed by prof M Miguel, the clinical anatomy part will be developed with real dissections made specifically for this lecture. Results: Conclusion: Knowledge of the clinical anatomy needed to understand the relationships between the different structures, the clinical history, and physical examination of GTPS patients and the therapeutic possibilities including ultrasound-guided injections are other steps that lead to an accurate diagnosis of GTPS References: [1] anatomy and anthropology: Maribel Miguel, Mike Benjamin [2] Clinical anatomy: Juan Canoso [3] Regional musculoskeletal ultrasound: Carlo Martinoli [4] Moller I, Bong D. Ultrasound-guided interventions in the hip joint. TechniquesIn Regional Anesthesia and PainManagement 2013; 17: 140–149 [5] Moller I, Janta I, Backhaus M, et al The 2017 EULAR standardized procedures for ultrasound imaging in rheumatology. Annals of the Rheumatic Diseases 2017;76:1974-1979. Disclosure of Interests: None declared

Summary Background The utility of anterolateral thigh (ALT) + iliotibial tract (ITT) flaps for the reconstruction of large abdominal wall defects has been reported, especially in cases with huge skin defects, surgical contamination, or a history of radiotherapy. However, previous reports have mainly described short-term results such as flap success rates or incidence of wound complications. The present study reviewed 50 consecutive cases of abdominal wall reconstruction using an ALT+ITT flap after extensive tumor resection and evaluated the durability of this approach (incidence of bulge or hernia) and the factors affecting the results. Patients and methods A detailed retrospective review of 50 consecutive cases was conducted. Computed tomography or magnetic resonance imaging findings were reviewed to assess the incidence of abdominal bulge or hernia. Items extracted as variables from patient records were subjected to univariate and multivariate logistic regression analyses to identify their relationship with postoperative abdominal bulge or hernia. Results Forty-six cases that were followed up for more than six months were analyzed. Twenty-three patients (50.0%) developed abdominal bulge, while none (0%) developed hernia. The multivariate logistic regression analysis revealed that old age and a high body mass index were independently associated with abdominal bulge, while abdominal defect size was not. Conclusions Abdominal wall reconstruction using an ALT+ITT flap after extensive tumor resection was considered a reasonable option with a low risk of hernia despite a marked incidence of postoperative abdominal bulge; however, the usage of additional material may be considered depending on the situation.