title: Breast ultrasonography in young Asian women: analyses of BI-RADS final assessment category according to symptoms.
abstract: BACKGROUND
  Breast ultrasound is the major imaging modality in young women because it incurs no radiation exposure and dense breast tissue, which is common in young women, yields a high rate of false-negative results on mammography.
  
  
  OBJECTIVE
  To investigate the cancer rates of the sonographic BI-RADS categorization and histopathologic results according to the presence of symptoms in young Asian women.
  
  
  METHODS
  We included 811 young women under 30 years of age who underwent a breast ultrasound during the study period. The mean age of all subjects was 24.5 years (range 11-29 years). Histopathologic results were compared with the results after application of the BI-RADS categorization.
  
  
  RESULTS
  Sonographic findings were classified as category 1 (n=192), category 2 (n=81), category 3 (n=399), category 4 (n=134), and category 5 (n=5). The cancer rates for category 1, 2, 3, 4, and 5 were 0, 0, 0.3, 6.3, and 100% in the symptomatic group, respectively. For the asymptomatic group, the cancer rates were 0, 0, 0, 8.7, and 100%, respectively. More cancers were found in high-risk women (22.2%, 4/18) than in non-high-risk women (1.4%, 11/793).
  
  
  CONCLUSIONS
  BI-RADS categorization was helpful for predicting the probability of malignancy in young Asian women.
authors.affiliation: Department of Radiology, Research Institute of Radiological Science, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Yu-Mee
authors.initials: YM
authors.lastname: Sohn
authors.forename: Min Jung
authors.initials: MJ
authors.lastname: Kim
authors.forename: Jin Young
authors.initials: JY
authors.lastname: Kwak
authors.forename: Hee Jung
authors.initials: HJ
authors.lastname: Moon
authors.forename: Soo Jin
authors.initials: SJ
authors.lastname: Kim
authors.forename: Eun-Kyung
authors.initials: EK
authors.lastname: Kim
mesh_terms: D000293:Adolescent; D000328:Adult; D044466:Asian People; D001941:Breast Diseases / Q000000981:diagnostic imaging; D001943:Breast Neoplasms / Q000000981:diagnostic imaging*; D002648:Child; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D012307:Risk Factors; D016217:Ultrasonography, Mammary / Q000379:methods*; D055815:Young Adult