Clear cell sarcoma of soft tissue is a rare type of soft tissue sarcoma. It is derived from melanoblast like cells located within subcutaneous tissue, tendon and aponeuroses. The tumour is also known as malignant melanoma of soft parts because it has similar morphology to malignant melanoma. Unlike malignant melanoma, however, it is not associated with a cutaneous lesion. We report here two cases of this tumour occurring in young adults.
Orthopaedic

Spontaneous atypical fractures of the femur have been reported in patients on long-term antiresorptive bisphosphonate therapy. Here, we report a case of subtrochanteric stress fracture in a seventy-year-old female patient on long-term alendronate therapy, and accompanying management challenges. Potential measures to prevent this complication of antiresorptive treatment for osteoporosis include the following: setting strict criteria for prescribing antiresorptive therapy, limiting the duration of continuous antiresorptive therapy, and increasing the use of bone anabolic agents.

Kimura disease is a chronic inflammatory disorder that is prevalent among Asians. It rarely affects the upper limbs or paediatric patients. We report a case of Kimura disease with first presentation as a soft tissue mass in the arm mimicking a soft tissue neoplasm with metastasis in a 12 year old Chinese boy.