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Superficial papillary adenomatosis of the nipple: a case report and review of the literature.

Superficial papillary adenomatosis of the nipple is a benign tumor of the ductal epithelium that clinically resembles Paget's disease. Histologically, the tumor is characterized by proliferating ductal structures lined by a double layer of columnar epithelium. Keratin cysts and apical intraluminal projections are commonly found. Since this entity's original description as "florid papillomatosis" in 1954, 174 cases have been reported in the English language literature. We review these cases and report a classic example.