Melanotic schwannoma mimicking metastatic pigmented melanoma: a pitfall in cytological diagnosis CT scan showing metastatic recurrence of melanotic schwannoma in the Download Scientific Diagram This is a very rare case of metastatic oral mucosal melanoma to the colon with an unusual presentation mimicking melanosis coli. The colonoscopy findings show no mass effect but multiple hyperpigmented lesions Diffuse melanosis cutis: a rare manifestation of metastatic melanoma BMJ Case Reports Pigmented Lesions of the Central Nervous System: Radiologic Pathologic CorrelationRadioGraphics Diffuse cutaneous melanosis: rare complication of metastatic melanoma * ScienceOpen