Malignant melanomatous schwannoma.
D000328:Adult; D002081:Buttocks; D005260:Female; D006801:Humans; D008545:Melanoma / Q000175:diagnosis*; D009378:Neoplasms, Multiple Primary / Q000175:diagnosis*; D009442:Neurilemmoma / Q000175:diagnosis*; D012983:Soft Tissue Neoplasms / Q000175:diagnosis*