森田 淳一

Junichi MORITA

埼玉医科大学第一外科

The First Department of Surgery, Saitama Medical School

キーワード : Breast tumor, Ultrasonic diagnostic criteria, Irregular shape, Rough border, Large longitudinal transverse ratio

　The seven criteria, such as shape, border, internal echoes, boundary echoes, posterior echoes, lateral shadow and longitudinal transverse ratio, have been proposed for diagnosing ultrasonographically breast cancers by the Committee of Japan Society of Ultrasonics in Medicine. This study was undertaken to analyze the significances of these proposed criteria in correlations between pathological diagnoses and indivisual ultrasound findings. The ultrasound examinations were carried out on 183 patients whose diagnoses were pathologically confirmed (68 malignant, 115 benign). The results are summarized as follows: 1) In the findings "internal echoes" and "lateral shadows", we could not find significant correlations between pathological diagnoses and ultrasound diagnoses. 2) In ultrasound finding "irregular shape", we found out the most highest accuracy in the correlation between pathological and ultrasound diagnoses in breast cancers (78.7%). The second accuracy in ultrasound diagnosis was found in "border" (76.5%). The third accuracy was found in longitudinal transverse ratio (72.1%). 3) The most significant criteria among seven proposed ones for diagnosing ultrasonographically breast cancers were the three major ultrasound findings, such as irregular shape, rough border and large longitudinal transverse ratio. 4) When at least two of three major criteria were positive, ultrasound diagnoses showed the highest accuracy in breast cancers.