title: Male breast cancer originating in an ectopic breast tissue in the umbilicus A Case Report.
abstract: BACKGROUND
  Accessory breast tissue is a rare finding in the general population with an incidence of 1-2%. Carcinomas of accessory breast tissue account for ∼0.3% of breast cancers, 5% of which are arising within a supernumerary breast. They are usually diagnosed at a later stage compared with breast cancer, due to their rarity and low clinical suspicion.
  
  
  METHODS
  We present the case of a 58 years old male who was admitted to our hospital for an umbilical hernia, surgical repair. During surgery a small skin biopsy was excised and sent for pathological examination as routine procedure. The histological report revealed the presence of a poorly differentiated carcinoma. Immunochemical analysis confirmed adenocarcinoma of breast origin.
  
  
  CONCLUSIONS
  Carcinomas of accessory breast tissue are rare and therefore they are usually of advanced stage in time of diagnosis. Few cases have been reported in literature of accessory breast tissue carcinomas in men. To the best of our knowledge, this is the only case in the literature, of ectopic breast tissue cancer in the umbilicus.
  
  
  BACKGROUND
  Ectopic breast, Male breast cancer, Umbilicus.
authors.forename: Nikolaos
authors.initials: N
authors.lastname: Kopanakis
authors.forename: Olympia
authors.initials: O
authors.lastname: Tzaida
authors.forename: Georgios
authors.initials: G
authors.lastname: Nikolaou
authors.forename: Dimitrios
authors.initials: D
authors.lastname: Ermidis
authors.forename: Vassiliki
authors.initials: V
authors.lastname: Manou
authors.forename: Elias
authors.initials: E
authors.lastname: Efstathiou
authors.forename: John
authors.initials: J
authors.lastname: Spiliotis
mesh_terms: D000008:Abdominal Neoplasms / Q000150:complications* / Q000473:pathology; D000230:Adenocarcinoma / Q000150:complications* / Q000175:diagnosis / Q000473:pathology; D014408:Biomarkers, Tumor; D001706:Biopsy; D001940:Breast; D018567:Breast Neoplasms, Male; D002828:Choristoma / Q000150:complications*; D003131:Combined Modality Therapy; D006554:Hernia, Umbilical / Q000150:complications* / Q000601:surgery; D059685:Herniorrhaphy; D006801:Humans; D033162:Incidental Findings; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D014472:Umbilicus / Q000473:pathology*
chemical_list: D014408:Biomarkers, Tumor