Pigmented Lesions of the Oral Mucosa Pocket Dentistry Pathology Outlines Mucosal melanoma (genital, oral, sinonasal) 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 Oral Melanoacanthoma: Case Series of 33 Cases and Review of the Literature Head and Neck Pathology Springer Nature Link Multifocal Pigmentation of the Oral Cavity The Journal of the American Dental Association