Variations of oral anatomy and common oral lesions Anais Brasileiros de Dermatologia (Portuguese) Pediatric Surgical Pathology of the Oral Cavity, Maxilla, and Mandible Springer Nature Link Tiny brown spot on the lip? Don't ignore it. A melanotic macule is a small, well circumscribed brown to black oral lesion most commonly seen on the lower lip and a high yield ADC exam favourite. Oral Malignant Melanoma Oral Cancer Foundation Information and Resources about Oral Head and Neck Cancer