Esophageal melanosis: Two case reports and review of literature

Figure 1 Imaging examinations. A: Endoscopic poorly delineated pigmented lesion (arrow) on the mucosa; B and C: Hematoxylin and eosin stain shows basal cell hyperplasia, intercellular edema, and presence on non-atypical cells with melanin deposition (arrow) along the basal layer of the epithelium, 10 × and 40 × magnification; D: SRY-related HMG box 10 immunohistochemistry red nuclear positivity in the melanocytes.