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Original Research |
1 Department of Radiology and Research Institute of Radiology, Asan Medical
Center, University of Ulsan, College of Medicine, 388-1 Pungnap-dong,
Songpa-Gu, Seoul 138-376, Korea.
2 Department of Pathology, Asan Medical Center, University of Ulsan, College of
Medicine, Seoul, Korea.
3 Department of Radiology, Hanyang University Hospital, College of Medicine,
Seoul, Korea.
OBJECTIVE. The purpose of our study was to retrospectively compare the sonographic and pathologic features of screening-detected and symptomatic ductal carcinoma in situ (DCIS).
MATERIALS AND METHODS. Of 5,790 cases diagnosed as breast cancer at our institution between January 1998 and December 2005, 528 (9.1%) cases were DCIS. We found 106 screening-detected and 125 symptomatic DCIS lesions in 226 patients (age range, 20–77 years; mean age, 47.8 years) who underwent preoperative whole-breast sonography and mammography. Three radiologists reviewed the sonographic features of these 231 cases of DCIS by consensus according to Breast Imaging Reporting and Data System (BI-RADS). The pathologic features were also reviewed. Statistical comparisons were performed using the chi-square test, the Fisher's exact test, and the Mann-Whitney U test.
RESULTS. On sonography, masses (p < 0.001) and associated ductal change (p = 0.019) were more common in symptomatic than in asymptomatic patients. Associated microcalcifications and posterior shadowing were more frequently found in screening-detected than in symptomatic DCIS (p < 0.001). On mammography, microcalcifications were more common in screening-detected than in symptomatic DCIS, and masses were more common in symptomatic than in screening-detected DCIS (p < 0.001). No significant differences were seen in the pathologic features of the two groups.
CONCLUSION. Our results showed that differences exist in the sonographic features of screening-detected and symptomatic DCIS. Recognition of the many and varied sonographic appearances of DCIS might be helpful to decrease the false-negative rate of bilateral whole-breast sonography and to detect symptomatic mammographically occult DCIS when we use sonography to supplement mammography.
Keywords: breast breast neoplasm ductal carcinoma in situ mammography pathology screening sonograph
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