psammomatous melanotic schwannoma

psammomatous melanotic schwannoma

A rare tumour which usually occurs in the setting of Carney's complex, often seen in the gastrointestinal tract, most commonly in the stomach.
 
DiffDx
Melanoma, GIST, pigmented neuroendocrine tumor, epithelioid leiomyoma.
References in periodicals archive ?
Psammomatous melanotic schwannoma, plexiform schwannoma, microcystic/reticular schwannoma are further variants of schwannoma8,9.
The differential diagnoses include pigmented (melanotic) neurofibroma, psammomatous melanotic schwannoma, and desmoplastic (neurotrophic) melanoma.
Psammomatous melanotic schwannoma may present rarely as a colorectal polyp comprising epithelioid cells with psammoma bodies and melanin pigment.
Psammomatous melanotic schwannoma presenting as colonic polyps.