Abstract
Background
Intraductal papilloma is a common breast lesion that may be associated with malignancy. While there is general agreement regarding surgical excision of intraductal papilloma with atypia, the management of benign intraductal papilloma is variable, involving either excision or observation. Of the small number of benign intraductal papillomas that upstage to malignancy on subsequent surgical excision, a significant number of these demonstrate malignancy in peripheral tissues adjacent to the biopsy site.
Case presentation
This report serves to illustrate two cases of benign intraductal papilloma upstaging to invasive lobular carcinoma and ductal carcinoma in situ.
Conclusion
Given the low rate of malignancy in benign intraductal papillomas, close surveillance may be recommended over surgical excision, however, generous sampling of the adjacent tissue about the target lesion should be considered.