Primary malignant melanoma of bone (clear cell sarcoma): A case report

Melanoma is a malignant tumor that predominantly arises in the skin. In rare cases, however, it can manifest in the bone too. In this paper, a primary malignant melanoma of the lesser trochanter of the right femur is described.In this case, the subject was a 19-year-old woman presenting with pelvic floor pain that lasted for 3 weeks.Magnetic resonance imaging (MDR) showed that T2MRI has bone melanoma soft tissue edema that sustained to malignant melanoma.Immunohistochemistry report revealed that tumoral cells were positive for HMB45, S100, which is suggestive of melanoma diagnosis.The patient was admitted and underwent CNB. Since the result was negative, the patient received a wide local excision from the right lesser trochanter. The histopathological examination of biopsy revealed fibro sclerotic tissue affected by malignant melanoma.The patient was then referred to an oncologist for postoperative adjust chemotherapy and target therapy.