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Basal Cell Carcinoma of the Nipple

papillary proliferation is admixed with fibrocystic changes including cysts, apocrine metaplasia, usual ductal hyperplasia and other proliferative fibrocystic changes, which impart the classic “swiss cheese” appearance. These features were absent in this case, ruling out that diagnosis. Therefore, the diagnosis was most consistent with papillary duct hyperplasia, which lacks these additional features. Papillary duct hyperplasia involving multiple ducts, or papillomatosis, typically spreads along ducts linearly, often in the periphery of the breast. It does not usually form a discrete nodule as seen in this case, making this a very unusual presentation. The descriptive term “nodular papillomatosis” was used to convey this unusual benign diagnosis. There are little data on the rare diagnosis of papillomatosis of the juvenile breast, but within the sparse literature there is evidence to support increased risk for future breast cancer. Thus, conservative resection with clinical follow-up to assess for recurrence as well as future breast disease is generally recommended. For this patient, it was felt that the mass had been adequately excised and further plans included clinical follow-up only.