A malignant melanoma may rarely arise in the prostate gland.
Grossly the tissue may appear black or dark-colored.
Histologic features of prostate tissue:
(1) malignant cells containing melanin
(2) positive immunohistochemical stains for melanoma
Differential diagnosis:
(1) melanoma metastatic to the prostate
(2) pigment in a prostate adenocarcinoma (melanosis, lipofuscin, hemosiderin)
(3) melanosis
(4) blue nevus of the prostate
To read more or access our algorithms and calculators, please log in or register.
Specialty: Urology, Hematology Oncology