Melanotic adenocarcinoma of the anorectum.


Epithelial cells of an otherwise typical anorectal mucinous adenocarcinoma contained melanin pigment. Ultrastructurally, three cell populations were present. The largest population contained membrane-bound compound melanosomes in cells having glandular epithelial characteristics including surface specializations, microvilli, and mucin. Additionally… (More)


Cite this paper

@article{Chumas1981MelanoticAO, title={Melanotic adenocarcinoma of the anorectum.}, author={John Chumas and C A Lorelle}, journal={The American journal of surgical pathology}, year={1981}, volume={5 7}, pages={711-7} }