The Pigmented Hard Palate: A Long Term Outcome of Imatinib Actas Dermo Sifiliogrficas Brown spots, especially on the lips, can be alarming to some. In some instances it can indicate rare oral mucosal melanoma, however in this case it was a non cancerous labial melanotic macule. Oral pigmentation in children: a diagnostic challenge Archives of Disease in Childhood Pigmented (Purple or Brown) Lesions in the Mouth Pigmented (Purple or Brown) Lesions in the Mouth Kazemi Oral Surgery Facialart.com