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The image diagnosis in early breast cancers in clinically studied.(1) Echography(1) After Hitachi EUB2D 7.5 MHZ being used, the accurate diagnosis rate and false negative rate in invasive breast cancers are 90.9% and 9.1%, in tumors less than 1.0 cm in diameter, and 92.0%, 8.0% in those from 1.0 to 2.0 cm respectively. All tumors more than 0.5 cm in diameter can be represented as tumor echo. (2) The accurate rate in non invasive breast cancers is 69.2%.(2) Mammography(1) Accurate and false negative rates in invasive breast cancers are 47.1% and 52.9%, in tumors less than 1.0 cm in diameter, and 80.7% and 19.3% in those from 1.0 to 2.0 cm respectively. Diagnostic rate in tumors less than 1.0 cm is bad. It is as not so good as 57.1% in non invasive breast cancers. (2) The 52.9% of infiltrating breast cancer tumors less than 1.0 cm and 83.2% of those from 1.0 to 2.0 cm can be represented as tumor shadow. The previous date was bad. Tumor shadow can be visualized in 57.1% of non invasive tumors. It is 64.7% in invasive ductal carcinomas with a predominant intraductal component. (3) The appearance rates of fine calcification (FC) are 23.5% in less than 1.0 cm and 43.2% in from 1.1 to 2.0 cm invasive cancers, while 50.0% in non invasive ones. (4) The cases having no tumor shadow but FC are found in 25.0% of invasive cancers less than 1.0 cm and 26.7% of those in from 1.1 to 2.0 cm. It is 33.3% in non invasive breast ones.

1) Noninvasive breast cancer was found in 16 (5.1%) among 314 female patients with primary breast cancer and, these 16 patients were studied retrospectively. Careful, skilled palpation could detect a tumor-like mass or induration even in noninvasive cancer. Nipple discharge was observed in only 4/16 patients (25.0%). Neither class IV nor V was found in cytological examination for their smears. Mammography revealed a tumor shadow in 43.8%, malignant fine calcification in 50.0%, and no such findings in 37.5% of the patients. 2) Echography represented a tumor echo in 84.6% of the 16 patients. 3) Aspiration biopsy cytology revealed 30.0% of the patients to be class IV or V. 4) 68.8% of the patients could not be definitely diagnosed till an excisional biopsy was made. 5) Since a large number of the patients had a palpable tumor more than 2.1cm in diameter measured pathologically, standard radical mastectmy had been performed for 37.5% of the 16 patients.