Background: The Knee injury and Osteoarthritis Outcome Score (KOOS) is a useful diagnostic tool to assess knee ligament injury and osteoarthritis, but no validated Indonesian version of the KOOS was available. Methods: We used the forward-backward translation protocol to develop the Indonesian version of the KOOS. The translated questionnaire was administered twice to 51 subjects diagnosed with a knee ligament injury and osteoarthritis. Validity of the questionnaire was assessed by analyzing the correlation between the score of each subscale and the overall score of the 36-Item Short Form Health Survey (SF-36) using the Pearson correlation coefficient. Reliability was measured by evaluating internal consistency (Cronbach α) and test-retest reliability (intraclass correlation coefficient). Results: For construct validity, moderate Pearson correlation coefficients were found between the KOOS subscales and the SF-36. Cronbach α was 0.84 to 0.97 for all subscales, indicating adequate internal consistency. The test-retest reliability was excellent, with intraclass correlation coefficients ranging from 0.91 to 0.99 for all subscales. No significant differences were found in the KOOS subscale responses between the first administration of the questionnaire and the second administration within 21 days. Conclusion: The Indonesian version of the KOOS was determined to be valid and reliable and is therefore an objective instrument for evaluating knee ligament injury and knee osteoarthritis in the Indonesian population.

Musculoskeletal tumors are relatively rare, with 0.2%-0.5% of all malignant tumors in all ages. The geographic distribution of musculoskeletal tumors varies significantly around the world. This study aims to describe the musculoskeletal tumor profile in Saiful Anwar General Hospital. All data were obtained from the department of orthopaedic and traumatology database, Saiful Anwar general hospital. Thus, patients who were diagnosed with either bone tumor or soft tissue tumor between January 2011 to December 2018 were selected for the present study. The clinical-pathological conference (CPC) was carried out to ensure the validity of all the registered data. A total of 577 patients with tumors from January 2011 to December 2018 was obtained. Out of all the cases, 439 (76%) cases are bone tumors, and the remaining 138 (24%) cases are soft tissue tumors. The most frequent locations of the musculoskeletal tumors are the long bones of the thigh and lower leg. This study shows an increasing trend in musculoskeletal tumors incidence, despite decreasing numbers in several years. This result goes along with a rising trend in malignancy cases with a higher amount compared to the benign one. Moreover, MBD and osteosarcoma were found to be the most common tumor and primary bone tumors, respectively. However, the fact that there is some data loss in the study limited the study for a more accurate result.   Keywords: Musculoskeletal tumor; Bone tumor; Osteosarcoma; Malang; East Java

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Introduction: The peroneus longus (PL) tendon is one of the autograft choices for knee ligament injury because of its safety, length, and strength. However, studies that evaluated donor site morbidity after PL tendon graft are still limited. This case series aims to evaluate the functional outcomes of donor site morbidity after full-thickness PL tendon harvesting for knee ligament reconstruction.Presentation of Case:This study evaluated four patients who had a revision of knee ligament reconstruction surgery using PL tendon autograft from August until September 2018. The functional outcome of the donor site was evaluated before surgery, two weeks, and three months after surgery by using functional scores assessment of foot and ankle.Discussion:There are some donor sites of autograft, but several studies show that the PL tendon autograft has proven to be more favorable methods for knee ligament reconstruction based on the accessibility, safety, and strength of the harvested tendon. The studies also found that using PL tendon as an autograft, has a good result in donor site morbidity evaluation compared to others. This study provides a satisfying result on the functional outcome of the donor site morbidity evaluation.Conclusion:This study showed satisfactory functional outcomes of the foot and ankle after harvesting full-thickness PL tendon. All functional score assessment provides an excellent result in three months after surgery, although lateral ankle bulging has occurred in all patients. However, gait analysis and isokinetic test with a more significant number of patients and longer follow up periods are necessary for further study.

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