Abstract
A case of breast carcinoma forming multiple cysts is presented. The patient was a 67-year-old female with multiple tumors in the right breast. Mammography showed dense tumor shadows with microcalcification. Echography revealed multiple cysts with intracystic protrusion. Furthermore, the tumors were displayed as hot region by thermography. A radical mastectomy was performed after excision of the tumors. The cut surface of the tumors showed multiple cysts with a protrusion. Light microscopically, several cysts showing proliferation of intracystic papillo-tubular carcinoma were observed. From these findings, we considered that the cystic tumors in this case might be a special type of intracystic carcinoma of the breast. Generally, intracystic carcinoma of the breast is considered to arise from malignant transformations of an intraductal papilloma or a benign cyst wall. However, we speculated that the tumors of the present case were formed of the obstruction of ducts by an intraductal carcinoma.
