Pigmented trichoblastoma.
Ackerman
A B
AB
D003951:Diagnostic Errors; D006201:Hair Diseases / Q000473:pathology*; D006801:Humans; D008297:Male; D008545:Melanoma / Q000473:pathology*; D008875:Middle Aged; D009373:Neoplasms, Germ Cell and Embryonal / Q000473:pathology*; D010859:Pigmentation Disorders / Q000473:pathology*; D012878:Skin Neoplasms / Q000473:pathology*