title: Percutaneous endoscopy-guided biopsy of an intracystic tumor with a mammary ductoscopy.
abstract: BACKGROUND
  Intracystic abnormalities of the breast may result from debris, intracystic papilloma, or rarely breast cancer. Intracystic tumors cannot be diagnosed based on imaging examinations or fine needle aspiration alone, and therefore excisional biopsy must be performed. We have treated many cases who had nipple discharge with mammary ductoscopy since 1992, and we have used this method to diagnose intracystic tumors.
  
  
  METHODS
  An endoscope was inserted into the cyst percutaneously, and the intracystic tumor was biopsied using forceps.
  
  
  RESULTS
  Six intracystic tumors were biopsied with the endoscope. Four of six cases were cancer, and two were benign papillomas.
  
  
  CONCLUSIONS
  We were able to visualize and accurately biopsy intracystic tumors of the breast using mammary ductoscopy.
authors.affiliation: Department of Breast and Endocrine Surgery, The Jikei University School of Medicine, Japan.
authors.forename: Ken
authors.initials: K
authors.lastname: Uchida
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Toriumi
authors.forename: Kazumi
authors.initials: K
authors.lastname: Kawase
authors.forename: Isao
authors.initials: I
authors.lastname: Tabei
authors.forename: Akinori
authors.initials: A
authors.lastname: Yamashita
authors.forename: Hiroko
authors.initials: H
authors.lastname: Nogi
mesh_terms: D000368:Aged; D044963:Biopsy, Fine-Needle / Q000379:methods*; D001940:Breast / Q000473:pathology; D047688:Breast Cyst / Q000473:pathology*; D001943:Breast Neoplasms / Q000473:pathology; D019723:Endoscopes; D004724:Endoscopy / Q000379:methods*; D005260:Female; D006801:Humans; D042361:Mammary Glands, Human / Q000473:pathology*; D008875:Middle Aged; D009558:Nipples / Q000378:metabolism; D010212:Papilloma / Q000473:pathology