title: [Ectopic breast cancer of the axilla].
abstract: BACKGROUND
  Breast cancer is the most frequent cancer occurring in women. These cancers may rarely develop within ectopic breast tissue. We report a case of ectopic axillary lobular carcinoma presenting as an isolated skin lesion with prolonged evolution.
  
  
  METHODS
  A 62 year-old women had a cutaneous lesion located in her left axilla for the past 4 years. The skin biopsy showed an infiltrating lobular carcinoma. A mammogram and an MRI were as unremarkable as two past mammograms performed since the beginning of the skin lesion. Surgical resection with lymph node dissection, associated with radiotherapy and hormonotherapy with tamoxifen, led to complete remission.
  
  
  CONCLUSIONS
  Ectopic breast tissue is subject to physiological and pathologic changes such as benign or malignant tumours. Cancer occurring in ectopic breast tissue remains rare but this diagnosis must be suspected when confronted with a skin lesion or mass located near the normal breasts.
authors.affiliation: Service d'Allergologie, Hôpital Tenon, Paris. emmanuelle.amsler@tnn.ap-hop-paris.fr
authors.forename: E
authors.initials: E
authors.lastname: Amsler
authors.forename: B
authors.initials: B
authors.lastname: Sigal-Zafrani
authors.forename: E
authors.initials: E
authors.lastname: Marinho
authors.forename: S
authors.initials: S
authors.lastname: Aractingi
mesh_terms: D018931:Antineoplastic Agents, Hormonal / Q000627:therapeutic use; D001365:Axilla; D001706:Biopsy; D001943:Breast Neoplasms / Q000188:drug therapy / Q000473:pathology* / Q000601:surgery; D018275:Carcinoma, Lobular / Q000188:drug therapy / Q000473:pathology* / Q000601:surgery; D002828:Choristoma / Q000188:drug therapy / Q000473:pathology* / Q000601:surgery; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D018714:Radiotherapy, Adjuvant; D012878:Skin Neoplasms / Q000188:drug therapy / Q000473:pathology* / Q000601:surgery; D013629:Tamoxifen / Q000627:therapeutic use
chemical_list: D018931:Antineoplastic Agents, Hormonal; D013629:Tamoxifen