Abstract
A comparative study of physical examination and imaging systems for preoperative diagnosis of breast cancer was performed on 207 cases treated at our hospital from January 1990 through December 1992. All cases were confirmed by histologic examination. The rate of accurate diagnosis was 90% for physical examination (PE), 86% for mammography (MMG), 84% for ultrasonography (US) and 90% for aspiration cytology. US showed the highest rate of definite malignancy. MMG was useful for the accurate diagnosis of nonpalpable breast cancer and tumors less than 1.0 cm in size. In younger patients, the diagnostic rate of PE was higher and that of MMG was worse. It was also low in noninvasive carcinoma and special types of invasive cancer. All of PE, MMG and US were positive in 80% and negative in 6%. We conclude that MMG is more effective than US, on combination with PE, for detection and screening of breast cancer. Two patients with a nonpalpable cancer of the contralateral breast detected by mammographic microcalcification are presented.
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