Metastatic cystic melanoma of unknown primary masquerading as sarcoma: Report of a rare occurrence

Abstract

Malignant melanoma of unknown primary is rare. Cystic malignant melanoma is again rare. Metastatic malignant melanoma with unknown primary presenting as a cystic mass in the anteromedial compartment of the thigh masquerading as soft tissue sarcoma has not been reported so far. We report one such rare occurrence in a 63-year-old male and review pertinent literature to increase awareness regarding such unusual presentations of malignant melanoma among radiologists and clinicians.

Keywords

• cyst
• malignant melanoma
• metastasis
• melanoma of unknown primary