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J Korean Radiol Soc. 1996 Jan;34(1):133-137. Korean. Original Article.
Cho SY , Choi CS , Kim HC , Choi MH , Kim EA , Bae SH , Kung SN .
Department of Radiology, Hallym University College of Medicine, Korea.

PURPOSE: To evaluate the inter observer variation in interpretation of the mammographic findings suggesting malignancy. MATERIALS AND METHODS: Sixty-two mammograms of proven breast cancer were retrospectively analyzed by5 radiologists based on the 15 findings that suggest malignancy. Using kappa value, the degree of interobserver agreement was calculated. RESULTS: There were fair to excellent interobserver agreements for 5 findings which were clustered microcalcifications(k=0.7642), ductal calcifications (k=0.5463), lobulated mass(k=0.4539), asymmetric breast parenchyma (k=0.4487) and nipple retraction(k=0.4061). The finding in which kappa value was lessthan 0.2 were intramammary lymph node(k=0.1572), duct ectasia(k=0.1453), phleomorphic calcifications(k=0.1309), architectural distortion(k=0.1247) and stellate mass(k=0.0200). CONCLUSION: The most reliable finding suggesting breast cancer was clustered microcalcifications.

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