Primary malignant melanoma of the urinary bladder.

Kojima, T; Tanaka, T; Yoshimi, N; Mori, H · Arch Pathol Lab Med · 1992

case_report · Level V

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Abstract

Primary malignant melanoma is an unusual neoplasm in the urinary bladder that is infrequently found in association with melanosis. We report a case of bladder-invasive malignant melanoma with melanosis in which the melanosis exhibited melanocytic atypia extending through to melanoma in situ and was diagnosed by immunohistochemical techniques using a monoclonal antibody, HMB-45. To our knowledge, such findings have not been reported previously.

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