oral melanotic macule on lip macule. Benign. Dark spot labia (or lip). Analogous to lentigo simplex. Hyperpigmented basal keratinocytes & dermal melanophages. Slight ⬆️ in single basal melanocytes; NO nests. More info like this in A pigmented macule (<1 cm)

A pigmented macule (<1 cm) on the lower lip, flat, well defined, and stable in color for years, is most likely: @Dental_exam A Oral melanotic macule B B Amalgam tattoo Melanoma D KAM An oral melanotic macule is a harmless dark spot found on the lip, most often the lower lip, or inside the mouth, either on the gums, inside the cheek, or on the roof of the mouth. An oral melanotic Mystery behind labial and oral melanotic macules: Clinical, dermoscopic and pathological aspects of Laugier Hunziker syndrome Differential Diagnosis of Pigmented Lesions in the Oral Mucosa: A Clinical Based Overview and Narrative Review PMC

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