Undifferentiated Sarcoma as Intermediate Step in the Progression of Malignant Melanoma to Rhabdomyosarcoma: Histologic, Immunohistochemical, and Molecular Studies of a New Case of Malignant Melanoma With Rhabdomyosarcomatous Differentiation.

Abstract excerpt

Malignant melanoma (MM) may display highly variable phenotypic diversity, sometimes associated with loss of immunohistochemical melanocytic markers and acquisition of nonmelanocytic lineage of differentiation. Primary cutaneous MM with rhabdomyosarcomatous differentiation is extremely rare with only 5 reported cases in the literature. To date, a chronological progression of a MM to rhabdomyosarcoma has not been...

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