Fig. 4
From: Unusual recurrent metastasizing benign breast papilloma: a case report
Left internal mammary node core biopsy. a Well-demarcated papillary neoplasm in fibroadipose tissue. No lymph node structure was identified. b Medium-power view of papillary neoplasm. Prominent fibrovascular cores with bland columnar cell lining. c p63 immunohistochemical stain highlights the intact myoepithelial layer beneath the columnar lining