Pigmented classic poroma: a tumor with a predilection for nonacral sites?

To the Editor, Classic poromas (CPs) are relatively common benign adnexal neoplasms that are typically located on the palms and soles, although other cutaneous sites can be affected. CPs are usually nonpigmented, but lesional pigmentation can occasionally be seen. A 66-year-old man presented with a crusted pigmented nodule on his left forearm. The clinical impression was concerning for nodular melanoma and an excisional biopsy was performed. Histopathological review revealed broad anastomosing cords and lobules of small monomorphous-appearing polygonal epithelial cells extending from the epidermis into the subjacent dermis (Fig. 1A and B). Duct formation with focal cystic degeneration was present centrally. Prominent melanin deposition, confirmed by Fontana-Masson staining, was