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Background Anterior Cruciate Ligament (ACL) is the most common ligament injury during sports activities that was treated with ACL reconstruction. Nowadays, peroneus longus is used in ACL reconstruction. However, it is difficult to predict the peroneus longus graft diameter for ACL reconstruction. Thus, preoperative measurements are very important to predict peroneus longus autograft for ACL reconstruction. Methods A cohort retrospective study was conducted using consecutive sampling method from February 2016 until October 2017 in our center. We recorded patients’ characteristics include gender, age, body weight, height, and Body Mass Index (BMI) preoperatively. We measured peroneus longus graft diameter intraoperatively, and analysed data using Spearman correlation. Results Thirty-nine patients met inclusion criteria. There were 28 males and 11 females in the peroneus group. From the patients' mean characteristics, age was 25.10 ± 9.16, body weight 71.23 ± 14.17, height 169.13 ± 8.81, and BMI 20.96 ± 3.44. Intraoperative peroneus longus diameter measurement was 8.56 ± 0.82. Spearman correlation showed significant correlation between intraoperative peroneus longus diameter with patient's height, body weight, and BMI with p, Highlights • Gender. • Height. • Weight. • Body Mass Index. • Peroneus longus tendon diameter. • Patients' characteristics in preoperative measurements can predict graft diameter intraoperatively.

BACKGROUND: Medial patellofemoral ligament (MPFL) reconstruction using quadriceps tendon (QT) grafts provides favorable results with minimal complications and can be performed in patients with open epiphyseal plates. Following MPFL reconstruction using QT grafts, the outcomes have been evaluated, but the residual quadriceps strength (QS) has never been evaluated. AIM: We analyzed the knee’s range of motion (ROM), thigh circumference (TC), and QS at donor leg sites compared with those at contralateral healthy sites after MPFL reconstruction. The hypothesis was that there is no morbidity at donor sites. MATERIALS AND METHODS: Patients who underwent MPFL reconstruction using QT autografts between January and December 2017 were recruited. The ROM, TC, and QS were measured 6 months postoperatively. RESULTS: Twenty-one patients (8 men, 14 women; mean age, 28.40 ± 10.78 years [range, 16–45]) were included in the study. The TCs at the donor and contralateral sites (medians: 37 and 37.5 cm, respectively) showed no significant difference (p = 0.64). QS measurements showed means of 182 ± 4.6 N and 190 ± 4.7 N at the donor and contralateral sites, respectively (p = 0.376). There were no ROM deficits. CONCLUSIONS: The ROM, TC, and QS at donor sites were similar to those at contralateral sites. The QT is a suitable graft for MPFL reconstruction.

BACKGROUND: Peroneus longus graft can be recommended as a superior graft over hamstring in anterior cruciate ligament (ACL) reconstruction. There are many studies concerning hamstring tendon regeneration, but there are few studies on the regeneration of the peroneus longus tendon after ACL reconstruction. AIM: This study aimed to investigate whether regeneration of the peroneus longus tendon occurs after ACL reconstruction with magnetic resonance imaging. METHODS: Twenty-five patients underwent ACL reconstruction with donors from the peroneus longus tendon by the same operator and were followed 12 months later with bilateral crural magnetic resonance imaging (MRI) for comparison of the donor and healthy peroneus longus tendon areas. Regeneration was assessed at 5 cm, 10 cm, and 15 cm from the ankle joint. RESULTS: The average age 30.4 (18-38) years old. There were 17 right and 8 left knees involved in this study. The interval between surgery and MRI was 1 year. The average regeneration presentation was located in the distal part (5 cm from the ankle joint) 66.78%, medial part (10 cm from the joint) 63.2%, and proximal part (15 cm from the ankle joint) 67.53%. There was no significant difference in the presentation of proximal, medial, and distal areas while there was a significant difference between age and regeneration of the proximal area, p