The association of breast and uterine carcinoma has been demonstrated by ma
ny authors. However, these double primaries with endometrial cancer having
pathologic features of a carcinocarcoma are a very rare phenomena. Moreover
, most of the cases are related to the previous use of tamoxifen for the tr
eatment of breast carcinoma. In the present study we describe a case of an
endometrial carcinosarcoma and a synchronous adenocarcinoma of the breast.