[A rare primary tumor of the cerebellopontine angle: melanotic schwannoma, a pigmented tumor with unpredictable prognosis].
Schwannomas are common ubiquitous benign tumours of the nervous sheaths. Among the various histopathological types, the pigmented schwannoma has to be distinguished from melanoma. We report a case of melanotic schwannoma of the cerebellopontine angle in a 52-year-old man with a slowly progressive cerebellar syndrome since 1978, who presented with a posterior cerebral fossa bleeding. Melanotic schwannoma is a rare form of schwannoma. The diagnosis remains difficult and melanotic schwannoma has been described as a part of the Carney complex. Distinguishing melanotic schwannoma from malignant melanoma is of paramount importance in planning the management, but these two tumours are probably sharing the same origin. It must be distinguished from classic schwannoma because its behaviour is unpredictable, requiring long-term follow-up.
Saint-Blancard
P
P
Service d'anatomie pathologique, hôpital d'instruction des armées Percy, 101, avenue Henri-Barbusse, 92140 Clamart, France. psbpercy@yahoo.fr
Goasguen
O
O
Kossowski
M
M
Dulou
R
R
D002530:Cerebellopontine Angle; D005500:Follow-Up Studies; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008543:Melanins / Q000032:analysis; D008875:Middle Aged; D009442:Neurilemmoma / Q000473:pathology*; D011379:Prognosis; D012878:Skin Neoplasms / Q000473:pathology*
D008543:Melanins