title: Intraductal papilloma of ectopic breast tissue in axillary lymph node of a patient with a previous intraductal papilloma of ipsilateral breast: a case report and review of the literature.
abstract: The presence of ectopic breast tissue in axillary lymph nodes (ALN) is a benign condition that must be differentiated from primary or metastatic carcinoma. Here we report a patient who underwent excision of enlarged ALN 10 years after she had received surgical treatment of ipsilateral breast for an intracystic intraductal papilloma (IDP). Histological examination of the removed ALN revealed that the proliferative lesion consisted of papillary and tubular structures lined by luminal cuboidal cells and a distinct outer layer of myoepithelial cells resembling IDP of the breast. Immunostaining with a set of immunohistochemical markers including AE/AE3, alpha-smooth muscle actin and p63 in combination with estrogen and progesterone receptors confirmed the diagnosis of ectopic IDP.This case shows that even though benign proliferative change in ectopic breast tissue is an extremely rare phenomenon, this possibility should be taken into account for correct diagnosis.
authors.affiliation: Institute for Oncology and Radiology of Serbia, 14 Pasterova, Belgrade 11000, Serbia.
authors.forename: Radan
authors.initials: R
authors.lastname: Dzodic
authors.forename: Boban
authors.initials: B
authors.lastname: Stanojevic
authors.forename: Vladimir
authors.initials: V
authors.lastname: Saenko
authors.forename: Masahiro
authors.initials: M
authors.lastname: Nakashima
authors.forename: Ivan
authors.initials: I
authors.lastname: Markovic
authors.forename: Gordana
authors.initials: G
authors.lastname: Pupic
authors.forename: Marko
authors.initials: M
authors.lastname: Buta
authors.forename: Momcilo
authors.initials: M
authors.lastname: Inic
authors.forename: Tatiana
authors.initials: T
authors.lastname: Rogounovitch
authors.forename: Shunichi
authors.initials: S
authors.lastname: Yamashita
mesh_terms: D000328:Adult; D001365:Axilla; D014408:Biomarkers, Tumor / Q000032:analysis*; D001706:Biopsy; D001940:Breast; D001943:Breast Neoplasms / Q000737:chemistry / Q000473:pathology* / Q000601:surgery; D049109:Cell Proliferation; D002828:Choristoma; D003951:Diagnostic Errors / Q000517:prevention & control; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008197:Lymph Node Excision; D008206:Lymphatic Diseases / Q000378:metabolism / Q000473:pathology* / Q000601:surgery; D008408:Mastectomy; D016609:Neoplasms, Second Primary / Q000737:chemistry / Q000175:diagnosis* / Q000601:surgery; D018300:Papilloma, Intraductal / Q000737:chemistry / Q000473:pathology* / Q000601:surgery; D011237:Predictive Value of Tests; D016896:Treatment Outcome
chemical_list: D014408:Biomarkers, Tumor