Melanotrichoblastoma: A Histopathological Case Report of a Rare Pigmented Variant of Trichoblastoma
August 2025
in “
Reports — Medical Cases Images and Videos
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TLDR A rare pigmented skin tumor called melanotrichoblastoma was diagnosed in a 51-year-old woman.
This case report describes a rare instance of melanotrichoblastoma, a pigmented variant of trichoblastoma, in a 51-year-old female. The patient presented with a lesion on the right lateral edge of the mons pubis, initially resembling an ingrown hair. Histological examination revealed a blue basaloid tumor with a significant pigment component, sharply demarcated from surrounding tissues. Immunohistochemistry showed strong positivity for epithelial markers and limited positivity for melanocytic markers in dendritic melanocytes, with a low proliferative index, leading to the diagnosis of melanotrichoblastoma.
