Primary Gastric Melanoma with Rhabdoid Features: A Case Report

Abstract

Malignant melanomas display a wide variety of morphologic patterns.1 Melanomas with rhabdoid appearance are rare and appear mostly as a recurrent or metastatic form, and only atypically arise as a primary lesion. Just eight cases of primary rhabdoid melanomas can be found in the literature since 1994.2-7 Malignant melanomas frequently metastasize to the gastrointestinal tract; they can be located in the stomach and are generally metastases of cutaneous melanomas. Primary gastric melanomas are extremely rare, and, to the best of our knowledge, a primary melanoma with rhabdoid features has not been reported thus far. Here, we report a case of primary gastric melanoma with rhabdoid features along with its immunohistochemical panels and ultrastructural findings.