橋本 隆¹, 小西 豊¹, 小縣 正明¹, 相川 貴子², 尾上 一美¹, 島田 啓子¹, 栃尾 人司¹, 簔輪 和士¹, 藤本 敏明¹, 森本 義人¹

Takashi HASHIMOTO¹, Yutaka KONISHI¹, Masaaki OGATA¹, Takako AIKAWA², Kazumi ONOUE¹, Keiko SHIMADA¹, Hitoshi TOCHIO¹, Kazushi MINOWA¹, Toshiaki FUJIMOTO¹, Yoshito MORIMOTO¹

¹神戸市立中央市民病院外科, ²神戸市立中央市民病院腹部超音波検査室

¹Kobe Municipal Central Hospital, Department of Surgery, ²Kobe Municipal Central Hospital, Abdominal Ultrasonic Laboratory

キーワード : Small Breast Cancer, Mastopathy, Ultrasonography

To improve the diagnostic accuracy of ultrasonography for small breast carcinomas, 51 cases with breast tumors less than 10 mm in diameter were investigated over the last four years. We defined the anterior and posterior borderlines of the mammary glands in order to differentiate benign disease from small breast carcinomas.
In malignant tumors, the anterior borderlines were found to be interrupted or rough in 80.4% and the posterior borderlines were in 60.8%. In benign tumors, these borderlines were not interrupted, but rough in 1.6%.
By means of ultrasonography, 7 out of 11 cases (72.7%) with tumors less than 5 mm in diameter were diagnosed to carcinoma, while correct diagnostic rate of total cases of small breast cancer was 88.2%.
In conclusion, ultrasonographic features of the anterior and posterior borderlines of the mammary gland were valuable findings for the differentiation between small breast carcinomas and benign disease.