title: [Efficacy of helical CT in evaluating local tumor extent of breast cancer].
abstract: OBJECTIVE
  To clarify the diagnostic accuracy of helical CT (HCT) in the determination of local tumor extent of breast cancer.
  
  
  METHODS
  One hundred forty consecutive patients with breast cancer, including 87 invasive ductal carcinomas without extensive intraductal components (EIC), 44 invasive ductal carcinomas with EIC, 2 non-invasive ductal carcinomas, and 7 invasive lobular carcinomas, were included in the study. Three-dimensional tumor diameter including whole extent was measured on HCT, and the amount of invasion to fat tissue, skin, pectoral muscle, and chest wall was estimated using a three-step scale. These results were then compared with the pathological findings.
  
  
  RESULTS
  Breast cancers appeared as areas of high attenuation compared with the surrounding breast tissue in all patients. Tumor extent was correctly diagnosed by HCT to within a maximum difference of 1 cm in 88 patients (63%) and within 2 cm in 122 patients (87%). Sensitivity, specificity, and accuracy in diagnosing muscular invasion of breast cancer using HCT were 100%, 99%, and 99%, respectively. Sensitivity, specificity, and accuracy in diagnosing skin invasion of breast cancer using HCT were 84%, 93%, and 91%, respectively.
  
  
  CONCLUSIONS
  HCT was able to visualize all of the tumors and detect the correct tumor extent in most patients.
authors.affiliation: Department of Radiology, Juntendo University Urayasu Hospital.
authors.forename: Y
authors.initials: Y
authors.lastname: Ozaki
mesh_terms: D000328:Adult; D001943:Breast Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D018270:Carcinoma, Ductal, Breast / Q000000981:diagnostic imaging; D018275:Carcinoma, Lobular / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D014057:Tomography, X-Ray Computed / Q000379:methods*