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Purpose: In spine care, frailty is associated with poor outcomes. The aim of this study was to describe changes in frailty in spine care during the coronavirus disease 2019 (COVID-19) pandemic and their relation to surgical management and outcomes., Methods: Patients hospitalized for spine pathologies between January 1, 2019, and May 17, 2022, within a nationwide network of 76 hospitals in Germany were retrospectively included. Patient frailty, types of surgery, and in-hospital mortality rates were compared between pandemic and pre-pandemic periods., Results: Of the 223,418 included patients with spine pathologies, 151,766 were admitted during the pandemic and 71,652 during corresponding pre-pandemic periods in 2019. During the pandemic, the proportion of high-frailty patients increased from a range of 5.1-6.1% to 6.5-8.8% (p < 0.01), while the proportion of low frailty patients decreased from a range of 70.5-71.4% to 65.5-70.1% (p < 0.01). In most phases of the pandemic, the Elixhauser comorbidity index (ECI) showed larger increases among high compared to low frailty patients (by 0.2-1.8 vs. 0.2-0.8 [p < 0.01]). Changes in rates of spine surgery were associated with frailty, most clearly in rates of spine fusion, showing consistent increases among low frailty patients (by 2.2-2.5%) versus decreases (by 0.3-0.8%) among high-frailty patients (p < 0.02). Changes in rates of in-hospital mortality were not associated with frailty., Conclusions: During the COVID-19 pandemic, the proportion of high-frailty patients increased among those hospitalized for spine pathologies in Germany. Low frailty was associated with a rise in rates of spine surgery and high frailty with comparably larger increases in rates of comorbidities., (© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)

Background:  The full impact of the COVID-19 pandemic on surgical spine care is difficult to assess due to a lack in nationwide evidence from more recent phases of the pandemic. We aimed to describe changes in in-hospital processes associated with spinal fusion procedures in the treatment of spinal infections (SI) during different phases of the pandemic., Methods:  In this retrospective observational study, we examined the in-hospital prevalence and outcomes of spinal fusion procedures for SI (along with patient characteristics, rates of transfer to intensive care units, and mortality rates) during the first four waves of the pandemic compared with the corresponding prepandemic periods in 2019. We used administrative data from a nationwide network of 76 hospitals managing 7% of all in-hospital cases in Germany., Results:  We observed no significant change in the prevalence of SI fusion procedures during the pandemic, neither in total numbers (349 vs. 373) nor for each wave separately. On a patient level, we found no differences in age, sex, and the prevalence of paresis, and no relevant differences in associated comorbidities. The rate of mechanical ventilation did not change during any of the examined pandemic waves: it ranged between 9.5 and 18.6% during the pandemic and 3.1 and 16.0% during the corresponding prepandemic control periods. The rate of transfer to intensive care changed only during wave 4 (from 70.4 to 54.8%; p  = 0.046) but not in any other pandemic phases. We observed no changes in in-hospital mortality rates (range: 2.9-9.7% vs. 6.2-11.3%) or in duration of hospital stay (range: 26.2-30.8 days vs. 20.8-29.2 days)., Conclusions:  The main finding of our study is that within this nationwide network of spine care centers in Germany, the delivery of surgical treatment of SI by means of spinal fusion procedures was maintained throughout the first four waves of the pandemic. Furthermore, there were no relevant changes in patient demographics, in-hospital processes, and mortality rates., Competing Interests: None declared., (Thieme. All rights reserved.)

This is a monocentric, retrospective study to analyze radiological findings as well as perioperative and postoperative complications in patients who underwent percutaneous triangular stabilization of type 3 and type 4 fragility fractures of the pelvis. From August 2017 to December 2018, 20 patients were treated surgically. Thirteen patients (65%) were followed-up and received a CT scan of the pelvis after an average time of 14.8 months. A total of 5 patients (38%) had to undergo revision surgery, 2 patients (15%) immediately, 3 patients (23%) in the interval. In 84.6% no fracture line was visible in the sacrum. Fracture healing of the anterior pelvic ring was observed in all cases. Our results show that percutaneous triangular stabilization of type 3 and type 4 fragility fractures of the pelvis usually leads to fracture healing. Radiological signs of loosening were observed in 62%, an implant removal due to symptomatic loosening was necessary in 23%., Competing Interests: The authors declare that they have no competing interests., (Copyright © 2020 Spalteholz et al.)

The 3D image enhancer-adjusted percutaneous triangular stabilization of geriatric pelvic ring fractures avoids implant-associated perioperative complications. Displaced fractures of the posterior pelvic ring require stable instrumentation to enable solid bony fusion in a balanced alignment and to control the risk of neurological and vascular damage. This is mandatory in high-energy injuries in young patients and especially in low-energy injuries of geriatric patients. Various surgical techniques have been established. The triangular stabilization technique shows the best biomechanical results. The percutaneous instrumentation reduces access-related morbidity and provides all the benefits of minimally invasive surgery. In order to avoid implant-associated complications, such as vascular and nerve injuries, anatomical and radiological principles are indispensable. The use of 3D image enhancement ensures a safe instrumentation. Nevertheless, pitfalls have to be considered. This article presents the technique of percutaneous triangular stabilization using the 3D scan. After percutaneous insertion of the guide wires into the L4 vertebral body, the iliac bone and transiliosacrally under 2D X‑ray control, the correct wire position is verified by the 3D scan. Then, screws are inserted and the instrumentation is completed in a standard fashion. Using this technique implant-associated perioperative complications, such as nerve and vascular damage due to screw misplacement can be reduced.

Rhabdomyosarcoma (RMS) represents a malignant tumor of skeletal muscle cells arising from rhabdomyoblasts. RMS represents the most common soft tissue sarcoma in children. In adults it is uncommon and accounts for less than 1% of all malignant solid tumors. While treatment protocols are well known for children, there is no standardized regimen in adults. This is one reason, why the outcome in adults is worse than in children. We present the case of a 59-year-old female patient with pleomorphic rhabdomyosarcoma (PRMS) infiltrating the thoracic spine. Multimodality treatment was performed including en-bloc resection, adjuvant multidrug chemotherapy and radiation beam therapy. The patient was tumor free and had no relapse within 6 month follow-up., Competing Interests: The authors declare that they have no competing interests.

Background: Pyogenic infections of the lumbar spine are a rare but critical pathology, yet with considerably high mortality rates. In cases indicating surgical therapy, the implantation of titanium cages or autologous bone grafts represent today's gold standard. Although non-metallic implants such as poly-ether-ether-ketone (PEEK) have proven to be advantageous in diverse degenerative conditions, their saftey and practicability in lumbar spine infection remains questionable. Moreover, the efficacy of a single-step radical debridement of the infected disc space with subsequent fusion from a strictly posterior approach continues to be an issue of debate. We therefore sought to evaluate the feasibility, clinical and radiological outcome of a single-step TLIF procedure using oblique PEEK cages in the surgical management of patients with lumbar pyogenic spondylodiscitis., Methods: From January 2009 through December 2013, all patients meeting the indication for surgical treatment of lumbar pyogenic spondylodiscitis were included. Patients demonstrating intact cortical bone on preoperative CT received a single-step radical debridement of the infected intervertebral disc space, posterior screw-and-rod instrumentation and implantation of an oblique PEEK cage using the TLIF technique. Oral antibiotics were continued for 12 weeks postoperatively and clinical and radiological results recorded throughout a minimum 1-year clinical follow-up., Results: A total of 104 patients were admitted to receive surgical therapy for lumbar pyogenic spondylodiscitis. Within this patient population, 18 patients met the diagnostic criteria to receive the implantation of an oblique PEEK cage. Pathogens were detected in 13 cases with Staph. aureus being the predominant causative organism. All patients were discharged to recover in their domestic environment. Throughout the first year of clinical and radiological follow-up and beyond, none of the 18 patients demonstrated any signs of residual neurologic deficits or recurrent infection. Furthermore, two-plane conventional X-rays showed no significant implant subsidence or failure at any of the given time-points in up to 5 years postoperatively., Conclusions: In patients meeting the criteria for surgical treatment of lumbar pyogenic spondylodiscitis, the implantation of PEEK cages using a single-step TLIF approach is a safe and feasible procedure. Based on our experience, the concern of a recurrent infection when implanting non-metallic cages may be refuted in carefully selected patients.

Introduction: Cervical spondylodiscitis is usually caused by pyogenic infections, associated with retropharyngeal abscesses, or due to the swallowing of foreign bodies. No cases of cervical spondylodiscitis caused by a penetrating neck injury have been published in the literature. We describe a case of cervical spondylodiscitis after multiple knife stab wounds to the lateral soft tissue of the neck., Materials and Methods: Case report and review of the literature., Results: A 54-year-old patient was brought to our clinic with destructive spondylodiscitis C3/4 with paravertebral and epidural abscesses. He had been involved in a fight and had suffered multiple stab wounds to his neck with a knife 1 month prior. The initial CT scan had revealed one deeper wound canal behind the sternocleidomastoid muscle on the left side without any injury to the vessels. The wound was cleaned and an antibiotic therapy with cefuroxime was given for 1 week. After an uneventful and complete healing of the wound the patient developed severe neck pain. Inflammatory laboratory parameters were elevated, and a MRI of the neck revealed a distinct spondylodiscitis C3/4 with paravertebral and epidural abscess formations. Surgery was performed and included debridement, abscess drainage, decompression of the spinal canal, fusion of the C3/4 segment using an autologous iliac crest bone graft and a plate osteosynthesis. A course of calculated antibiotic therapy was administered for 8 weeks. Normal laboratory parameters and no radiological signs of an ongoing inflammatory process were observed during follow-up examinations. The C3/4 segment was consolidated., Conclusion: Stab wound injuries to the neck not only bear the risk of injuries to the nerves, vessels and organs of the neck but also increase the risk of developing secondary spondylodiscitis. Specifically, cervical spondylodiscitis can result in distinct neurological symptoms, and surgical intervention should be performed in a timely manner., (Copyright © 2015 Elsevier Ltd. All rights reserved.)

Purpose: The objective of this study was to investigate the outcome of a case series of patients with dysphagia resulting from diffuse idiopathic skeletal hyperostosis (DISH) of the cervical spine who were treated surgically with resection and fusion., Methods: A retrospective study was performed on all patients who presented (2005-2013) with complaints of dysphagia or respiratory compromise and who underwent anterior cervical osteophyte resection with fusion (polyether ether ketone cage and/or plate system) using an anterior approach. All patients were diagnosed with DISH and underwent preoperative esophageal and laryngoscopic examinations and a fluoroscopic swallowing study. Initial non-operative strategies were performed, including diet, change in head position during swallowing, non-steroidal anti-inflammatory drugs and pantoprazole., Results: A total of six patients with DISH were included. The mean age was 67 ± 5 years. All patients were male and had symptoms of dysphagia and neck pain, one had simultaneous airway complaints, and another had regurgitation with a sleep disorder. All patients had significant improvements in dysphagia, respiratory complaints and regurgitation 6 weeks after surgery. The postoperative radiographs showed complete removal of the compressive structures. There were no postoperative complications. At the final follow-up (23 ± 8 months), the radiographic examinations showed no pathological regrowth, and the patients reported no recurrence of dysphagia., Conclusion: Diffuse idiopathic skeletal hyperostosis may lead to osteophyte-associated pathologies of the aerodigestive tract. Preoperative investigations with esophageal and laryngoscopic examinations combined with fluoroscopic swallowing tests are essential. Surgical decompression through osteophytectomy and fusion is an effective management strategy in selected patients and should be considered when non-operative strategies have failed.

Objective: Non-union of osteoporotic vertebra fractures are a seldom entity. However, when back pain persists in the course of conservatively treated osteoporotic vertebra fractures, a non-union should be considered. We thus sought to validate our diagnostic algorithm in patients with known osteoporotic vertebra fractures presenting persistent back pain and advert to the diagnosis and treatment of vertebral non-unions., Patients and Methods: Patients admitted with preexisting osteoporotic vertebra fractures and therapy-resistant back pain were retrospectively analysed. All admitted patients were subject to standard plain radiographs in erect position and conventional CT or MR imaging of the spine, respectively. In addition, patients with suspected non-union were subject to lateral fulcrum radiographs in supine position., Results: From a total of 172 admitted patients, four patients presented with non-union of a fractured osteoporotic vertebra (2%). The subsequent surgical therapy included cement-augmented rod-and-screw stabilization, with or without additional correction of deformity, and kyphoplasty (N = 3) or kyphoplasty alone (N = 1). All surgical interventions were successful in pain reduction and allowed immediate and improved postoperative mobilisation., Conclusions: Non-union of osteoporotic vertebra fractures must be considered when symptoms outlast conservative treatment. In these cases, plain lateral fulcrum radiographs are a simple and effective adjunct to the conventional diagnostic methods. Surgical stabilization then proves to be the effective treatment of choice.

Background: The stand-alone treatment of degenerative cervical spine pathologies is a proven method in clinical practice. However, its impact on subsidence, the resulting changes to the profile of the cervical spine and the possible influence of clinical results compared to treatment with additive plate osteosynthesis remain under discussion until present., Methods: This study was designed as a retrospective observational cohort study to test the hypothesis that radiographic subsidence of cervical cages is not associated with adverse clinical outcomes. 33 cervical segments were treated surgically by ACDF with stand-alone cage in 17 patients (11 female, 6 male), mean age 56 years (33-82 years), and re-examined after eight and twenty-six months (mean) by means of radiology and score assessment (Medical Outcomes Study Short Form (MOS-SF 36), Oswestry Neck Disability Index (ONDI), painDETECT questionnaire and the visual analogue scale (VAS))., Results: Subsidence was observed in 50.5% of segments (18/33) and 70.6% of patients (12/17). 36.3% of cases of subsidence (12/33) were observed after eight months during mean time of follow-up 1. After 26 months during mean time of follow-up 2, full radiographic fusion was seen in 100%. MOS-SF 36, ONDI and VAS did not show any significant difference between cases with and without subsidence in the two-sample t-test. Only in one type of scoring (painDETECT questionnaire) did a statistically significant difference in t-Test emerge between the two groups (p = 0.03; α = 0.05). However, preoperative painDETECT score differ significantly between patients with subsidence (13.3 falling to 12.6) and patients without subsidence (7.8 dropped to 6.3)., Conclusions: The radiological findings indicated 100% healing after stand-alone treatment with ACDF. Subsidence occurred in 50% of the segments treated. No impact on the clinical results was detected in the medium-term study period.

Background: Despite significant advances in the conservative management of pyogenic spondylodiscitis, consecutive instability, deformity, and/or neurologic compromise demands a prompt surgical intervention. However, in rare cases involving additional multilevel epidural abscess formation, the appropriate surgical strategy remains controversial. In this retrospective cohort analyses, we evaluated the efficacy of a single-stage posterior approach with the addition of a one-time multilevel epidural lavage via the surgically exposed interlaminar fenestration of the infected segment., Methods: From January 2009 through December 2010, 73 patients presenting pyogenic spondylodiscitis with instability of the lumbar spine were admitted. In all cases, the surgical strategy included a radical resection of the affected intervertebral disc and stabilization by intervertebral fusion using a titanium cage with autologous bone grafting in a level-dependent posterior approach with additional pedicle screw-and-rod instrumentation. In cases where multilevel abscess formation was evident, the standard surgical procedure was complemented by drainage and irrigation of the abscess from posterior by carefully advancing a soft infant feeding tube via the surgically exposed epidural space under fluoroscopic guidance. All patients received complementary oral antibiotic therapy for 12 weeks and were followed-up for a minimum of 12 months postoperatively., Results: Ten patients (three male and seven female patients; mean age: 64.9 ± 10.9 years) presented with an additional lumbar epidural abscess extending beyond three levels proximal or distal to the infected disc. In all 10 patients the laboratory-chemical inflammatory parameters (leukocyte count, C-reactive protein) remained within the physiologic range after completing antibiotic therapy throughout the 1-year follow-up period. The plain radiographs and magnetic resonance imaging demonstrated solid fusion and the complete remission of the initial abscess formation after 3 to 6 months with no recurrence of infection, respectively., Conclusion: The onetime epidural lavage presented in this small patient cohort proved to be an effective surgical adjunct with minimal exposure-related morbidity. We believe that the possibility of early mobilization and the patient's increased rehabilitation potential reduce the risk of nosocomial complications that often coincide with this multimorbid high-risk group of patients., (Georg Thieme Verlag KG Stuttgart · New York.)

Background: Spondylosclerosis hemispherica is a rare syndrome of the spine and was described first by Dihlmann. The typical radiographic appearance is a hemispherical sclerosis of the vertebral body, which is accompanied by pain in the affected region. Usually it appears at the lower lumbar spine. The etiology varies and includes degenerative disk diseases, scoliosis, bacterial infections, ankylosing spondylitis, osteoid osteoma, and malignant diseases.The radiological findings of 2 patients with spondylosclerosis hemispherica are presented and the current literature discussed., Material and Methods: Two women (33 and 60 years old) with spondylosclerosis hemispherica of the lower spine suffered from low back pain and fulfilled all criteria of Dihlmann's description. Malignant disease was excluded in both cases with a broad diagnostic workup (lab values, x-ray, CT scan, MRI) and in one case a biopsy from the affected vertebra was taken., Results: In both cases all radiological findings demonstrated the typical changes of spondylosclerosis hemispherica with sclerosis of the vertebra body and erosions at the upper and inferior end plates. Malignant disease was excluded in one case with a biopsy and in the other case with noninvasive diagnostic procedures. Both patients were treated nonsurgically. During clinical follow-up, the patients were in a good condition with decreasing regional low back pain and no ongoing radiological changes in the affected vertebral bodies., Conclusion: Spondylosclerosis hemispherica is a syndrome with a typical radiographic appearance. The etiology of spondylosclerosis hemispherica is manifold; however, malignancy must be excluded. In most cases, noninvasive diagnostics are sufficient to rule out malignant growth even in cases with concomitant degenerative changes of the affected segment. Thus, there is no need for a biopsy except in cases with ambiguous results. Subsequently, close clinical and radiological follow-up of the patients with spondylosclerosis hemispherica is necessary.

Background: Low back pain is a very common disorder. In this field chronic low back pain represents a special challenge. The management of chronic low back pain consists of a range of different intervention strategies. Usually operative intervention should be avoided if possible. However, there are constellations were surgical therapy in patients with chronic low back pain seems to be meaningful. The aim of this study was to investigate the clinical outcomes after spine surgery and hip replacement in patients with chronic low back pain after undergoing a structured rehabilitation program including cognitive - behavioral therapy., Methods: From January 1, 2007 to January 1, 2010 patients were indicated for total hip replacement (THA) or spine surgery after receiving inpatient multidisciplinary pain programs including cognitive - behavioral therapy at our orthopedic institute with a specialized unit for the rehabilitation of chronic pain patients. Indications for surgery were based on the synopsis of clinical and imaging findings and on positive effects after local injections during the multidisciplinary pain program. The tools for assessment included follow-up at 6 and 12 months and analyses of pain, chronicity, physical functioning and depression., Results: Of the 256 patients admitted for multidisciplinary pain program, fifteen were indicated to benefit from a surgical intervention during multidisciplinary pain program. Ten patients received spine surgery. THA was indicated in five patients. In all cases, the peri- and postoperative clinical courses were uneventful. Only two of the patients subjected to spine surgery and three patients who had THA were improved after 12 months. One patient reported a worsened condition. All patients presented with good functional outcomes and normal radiological findings., Conclusions: The indication for surgical intervention in patients with chronic low back pain and degenerative diseases must be critically assessed. THA in this cohort should focus on functional aspects, such as the improvement of range of motion, rather than the reduction of pain. Spine surgery in chronic low back pain patients after multidisciplinary pain program including cognitive - behavioral therapy cannot be recommended due to its questionable success.

Introduction: Solitary bone plasmacytoma (SP) is a rare diagnosis for which the primary treatment is local radiotherapy. There is no established consensus suggesting a total spondylectomy in spinal SP., Materials and Methods: We report the case of a 43-year-old woman with solitary plasmacytoma of the lumbar spine treated with complete vertebral resection. Radiographs, CT scan and MRI showed a single osteolytic lesion of the third lumbar vertebra. Further diagnostics following recommended algorithm for tumour screening were negative. Two times, biopsy showed no histological pathologies. Due to the instability of the spine with suspicious unknown lesion, we decided to perform a dorsal lumbar approach and instrumentation with complete resection of the posterior parts to prepare for a complete resection if mandatory. Resamples were taken and the bone surfaces sealed. Consecutive findings were positive for plasma cell infiltration of the respective vertebra, however not on the first pass, but after diagnostic pathological reference. Surgery was completed by total spondylectomy. Reference histological findings with restaging and cytogenetic risk analysis confirmed a non-high-risk solitary bone plasmacytoma, and the patient was scheduled for localized radiotherapy with 40 Gy., Results: Follow-up examinations (53 months) showed no local recurrence or disease progression., Discussion: There is no consensus in the literature regarding appropriate surgical approach and perioperative strategies in the treatment of solitary plasmacytoma. The finding of a solitary plasmacytoma of the spine was the determining factor for our decision to perform radical surgery with subsequent radiotherapy. The rationale for the chosen approach was to minimize the risk of local recurrence and to avoid conversion into multiple myeloma. The follow-up with 53 months is limited. However, discussion remains, if radical surgery in addition to local radiotherapy could be an alternative therapeutic approach depending on paraclinical parameters, age and cytogenetic risk analysis.

Introduction: Standard straight stems have been recognized as a gold standard implant in the field of hip replacement surgery. However, lately uncemented bone-preserving short stems started to gain more and more popularity. This was reflected in the increasing variety of available models. Up till now, short and mid-term results are available., Patients and Methods: In 2002, the cementless short stemmed GHEs was introduced. 380 patients were included in our study between 2002 and 2008. Only GHEs short stems were implanted. The clinical and radiological evaluations were performed in the Orthopaedic Department, Leipzig University Hospitals, on the average of 24 months (3 to 60 months) postoperatively., Results: 365 primary implantations and 15 revision implantations were carried out. Average age 60 years. Favourable clinical and radiological outcome was seen in 361/380 patients (95%). Postoperative complications were seen in 19/380 patients (5%): 8 fissures/fractures (2.1%), 5 infections (1.3%), 4 aseptic loosenings (1.1%), 2 dislocations (0.5%)., Conclusions: Short stem implants, including our own experience with GHEs model, are satisfying and promising. They represent a valuable supplementation of the treatment modalities in hip replacement surgery. However, long term results are still awaited.

Background: The aim of this study was to evaluate the clinical outcome after radical surgical treatment of multifocal infections involving the spine., Methods: The study demonstrates a retrospective chart review of seven patients who had more than three different abscesses in the musculoskeletal system and at least one of them in the area of the spinal column. All patients had a sepsis., Results: Beside different musculoskeletal abscesses four patients had a spondylodiscitis in the cervical spine segments C4/5 or C5/6. Six patients had inflammatory processes in the lumbar spine with epidural abscesses, diffuse thoracolumbar paravertebral abscesses and a spondylodiscitis in different segments. In all cases we performed a radical surgical treatment of all related inflammatory focuses. Prompt radical surgical treatment of the spine included decompression, debridement and in the cases of spondylodiscitis a fusion of the involved segments. For more than one focus at the spine, a surgical one-step procedure was performed. An antibiotic therapy was administered for six to eight weeks. In follow up examinations no signs of ongoing inflammatory processes were seen in imaging studies or laboratory tests., Conclusions: In the event of multiple abscesses of the musculoskeletal system involving the spine an early correct diagnosis and radical surgical treatment is recommended. We strongly favor a surgical single-stage procedure for treatment of multiple infections of the spine. In addition to a radical debridement and a sufficient decompression, the segmental fusion of affected areas in spondylodiscitis is essential. At the same time a surgical therapy of all other infected sites should be performed.

The current operative approaches and technical possibilities in the operative treatment of spinal metastases are manifold which enables an individual operative strategy adapted to the patient's condition. Maintaining quality of life is the primary goal in the treatment of these patients. The therapeutic goals, such as pain control, avoidance of neurological deficits and the achievement of spinal stability have to be attained with as little morbidity as possible. From this perspective the available operative techniques ranging from minimally invasive approaches to complex reconstructive surgery will be addressed and discussed in this article.

Advances in early detection and therapy of spinal metastasis have improved life expectancy of patients with various tumor entities. However, this and the demographic development have led to an increased risk for developing spinal metastases. Numerous prognostic factors have been determined to allow an assessment of outcome and survival time of patients with metastatic spinal tumors. The implementation of these factors into different scoring systems has been encouraging in the decision making process of spinal surgery. This overview highlights some of the most important prognostic factors and scores which may facilitate surgical considerations.

The aneurysmatic bone cyst (ABC) is a benign primary bone tumour. If located in the cervical spine, its expansive growth and destructive behaviour may lead to instability and serious neurological impairment. We report a case of a 16-year-old boy with an aggressive ABC in the 7th cervical vertebra. Computertomographic and magnetic resonance imaging revealed the envelopment of the left 7th and 8th spinal nerve along with the anterior displacement of the left vertebral artery. The interdisciplinary surgical strategy consisted of a partially incomplete cyst resection, subtotal spondylectomy with posterior screw-and-rod fixation from C6-Th1, iliac crest bone grafting and anterior plating from C6-Th1. With regard to the high rate of recurrence after incomplete resection published in the recent literature, the patient was postoperatively treated by megavoltage radiotherapy with a total dose of 30Gy (daily dose of 1.8 Gy for 3 weeks). The clinical and radiographic follow-up showed complete recovery of all neurologic impairments and no signs of tumour recurrence at 3, 6 and 12 months after surgery. This case highlights diverse treatment regimens and shall outline the challenge and the problems of the interdisciplinary decision-making in adolescents presenting with ABC in high-demanding anatomical regions.

Short-stemmed endoprostheses in total hip arthroplasty are anchored exclusively in the metaphysis and the proximal part of the diaphysis. Therefore, they are much shorter than the classic standard stems. These implants are specially favourable in terms of eventual revision surgery, and also due to the fact that with close diaphyseal bone marrow spaces a sufficient proximal size dimensioning is possible. In this study, the best known short-stemmed systems in clinical use are introduced. Positive long-term results are so far available only with the Pipino and Mayo stems, short and partially medium-term experience with the remaining short stems (C.F.P.(R), Metha, PROXIMA, ESKA) are--with the available learning curve--encouraging. Despite the call for sufficient experience and scientific evaluation, short-stemmed endoprostheses already represent a valuable alternative in endoprosthetics for younger patients.