Journal of Korean Society of Ultrasound in Medicine 2011;30(4): 299-305.
Diagnosis of Ductal Carcinoma in situ: Role of Additional Breast Sonography.
Sae Rom Hong, Hee Jung Moon, Min Jung Kim, Eun Kyung Kim
Department of Radiology, Research Institute of Radiological Science, Yonsei University College of Medicine, Korea. ekkim@yuhs.ac
  Published online: December 1, 2011.
ABSTRACT
PURPOSE: To verify the role of additional sonography on routine mammograms in the diagnosis of ductal carcinoma in situ (DCIS). MATERIALS AND METHODS: Between 2005 and 2008, a total of 105 breasts belonging to 102 patients were diagnosed with DCIS by surgery. Preoperative ultrasound and mammographic findings and reports using BI-RADS were retrospectively reviewed and analyzed. In both mammogram and ultrasound, BI-RADS categories 1, 2, and 3 were regarded as negative results and categories 4 and 5 as positive results. We analyzed the frequency in which additional ultrasound examinations aided in the diagnosis in each mammographic finding. RESULTS: Out of the 105 cases, 96 showed positive results on a mammogram and 9 cases showed negative results. Clustered microcalcifications, positive mammographic findings, were found most often (64/96, 66.67%). In those cases, ultrasound examinations gave no additional information, but did enablesonographically-guided biopsies in 38. In the 32 cases with other positive mammographic findings, ultrasound examinations were helpful in 15 cases. Of the 9 cases showing negative results on a mammogram, 8 cases were correctly diagnosed with DCIS because of the additionally-performed ultrasound examination, but 1 case returned a false negative on both the mammogram and ultrasound examination. CONCLUSION: Additional sonography contributes to a diagnosis of DCIS in patients with negative mammographic findings, nonspecific mammographic findings, or multifocal lesions.
Keywords: Ductal carcinoma in situ (DCIS); Breast ultrasound
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