Orthopedics
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Subchondral insufficiency fracture of the femoral head is a rarely reported lesion, often confused with osteonecrosis, transient osteoporosis of the hip, or rapidly destructive coxarthrosis. However, almost all the previous reports about this lesion have documented unilateral cases. We report the clinical and histological features of bilateral subchondral insufficiency fracture of the femoral head in a 68-year-old woman. ⋯ A lateral radiograph 3 weeks after the onset of pain in the right hip shows irregularity at the surface of the femoral head. Cross-section of the right femoral head showed a concave fracture line in the subchondral bone. Based on these findings, bilateral subchondral insufficiency fracture of the femoral head was diagnosed.
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This study examined the forces during motion across human meniscal tears. Longitudinal cuts were created in 6 human cadaveric knees at the red-white junction of the medial and lateral menisci into which a pressure transducer was placed. ⋯ No distraction pressures were observed. Therefore, meniscal tear displacement does not occur with knee motion and a meniscal repair device load-to-failure strength may be less important than the device's ability to accurately reduce a meniscal tear and avoid shear stress.
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Synovial sarcomas comprise between 5% to 10% of all soft tissue sarcomas in adults. It has a predilection for young adults and is one of the more frequently misdiagnosed soft tissue sarcomas. It is not unusual for synovial sarcoma to present initially after a traumatic event. ⋯ This article presents a case of a 17-year-old adolescent boy who presented with simultaneous enlarging masses involving the skull and thigh. Open biopsies confirmed synovial sarcoma in both regions. Staging studies, including computed tomography (CT) of his chest, abdomen/pelvis and bone scan were otherwise negative for metastasis.