Habitual khat chewing and oral melanoacanthoma: A case report

Figure 1 Intraoral examination. A and B: Clinical photos of the oral cavity illustrate a diffuse dark brownish-black pigmented lesion with an ill-defined margin covering the right lower gingiva, right buccal and labial vestibules, and right buccal mucosa.

Figure 2 Histopathological photomicrographs. A: Histopathological photomicrograph of Hematoxylin and Eosin stained section shows spongiosis, acanthosis, and dendritic melanocytes in the parakeratinized stratified squamous epithelium. Also, show the lamina propria with melanin deposit; B: Histopathological photomicrograph of Melan-A-stained section shows dendritic melanocytes (green arrows) and melanocytic hyperplasia (blue stars) throughout the epithelium; C: Histopathological photomicrograph (higher magnitude) of Melan-A-stained section shows dendritic melanocytes (green arrows) and melanocytic hyperplasia (blue stars) throughout the epithelium.

Figure 3 Follow-up clinical photos. A: Two-month follow-up clinical photos of the right buccal mucosa showing partial resolution of the oral lesion; B: A 4-mo follow-up clinical photo of the oral cavity illustrates the complete resolution of the oral melanoacanthoma.