Occult breast cancer: prevalence and radiographic detectability.

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Abstract
The radiographic detectability of occult breast cancer has been difficult to determine. A prospective study of breast disease was carried out that involved the performance of subcutaneous mastectomies in 519 consecutive cases of traumatic or initially unexplained death in Nex Mexico. Routine mammograms and radiographs of 1-cm specimens were obtained. At least 18 biopsies were performed in each subject. Carcinoma was identified in ten subjects; one subject had metastatic carcinoma from the lung, and two subjects had bilateral breast cancer, for a total of 11 breast cancers were apparent only on histologic study of breast tissue that was not suggestive of malignancy. No cancer was found in subjects under the age of 39 years. Five carcinomas were found in the 40-69-year age group; six were found in the 70-year and over age group. No correlation was noted between the radiographic Wolfe parenchymal patterns and the prevalence of breast cancer.