title: Dilated duct pattern at mammography.
abstract: OBJECTIVE
  To determine the importance of a dilated duct pattern at mammography.
  
  
  METHODS
  Mammograms obtained in 46 women with histopathologically proved, asymmetrically dilated ducts were retrospectively studied. The laterality and location of the asymmetrically dilated duct, the presence of branching, and associated findings such as microcalcifications, nipple discharge, and interval change were evaluated.
  
  
  RESULTS
  Eleven patients (24%) had malignant results (ductal carcinoma in situ or invasive ductal carcinoma). Among these, six (54%) had suspicious microcalcifications. Nonsubareolar location and interval change are significant (P = .04) variables associated with malignancy.
  
  
  CONCLUSIONS
  Mammographic asymmetrically dilated ducts in a nonsubareolar area that are associated with interval change, suspicious microcalcifications, or both warrant biopsy.
authors.affiliation: Department of Radiology, University of Texas Health Science Center at Houston, 77030, USA.
authors.forename: P T
authors.initials: PT
authors.lastname: Huynh
authors.forename: J A
authors.initials: JA
authors.lastname: Parellada
authors.forename: E S
authors.initials: ES
authors.lastname: de Paredes
authors.forename: J
authors.initials: J
authors.lastname: Harvey
authors.forename: D
authors.initials: D
authors.lastname: Smith
authors.forename: L
authors.initials: L
authors.lastname: Holley
authors.forename: M
authors.initials: M
authors.lastname: Maxin
mesh_terms: D000328:Adult; D000368:Aged; D001706:Biopsy; D001941:Breast Diseases / Q000209:etiology*; D001943:Breast Neoplasms / Q000150:complications / Q000000981:diagnostic imaging* / Q000473:pathology*; D002114:Calcinosis / Q000209:etiology*; D018270:Carcinoma, Ductal, Breast / Q000150:complications / Q000000981:diagnostic imaging* / Q000473:pathology*; D004108:Dilatation, Pathologic; D005260:Female; D006801:Humans; D008327:Mammography / Q000592:standards*; D008875:Middle Aged; D015203:Reproducibility of Results; D012189:Retrospective Studies