Metastasis of cancer to cancer is exceedingly rare, the most frequent being metastasis
from bronchogenic carcinoma to renal carcinoma. A case of breast carcinoma metastasizing
to a fibrosarcomatous malignant mesothelioma is presented. Breast carcinoma metastasizing
to another carcinoma has been reported 4 times in the past. To our knowledge no case
of breast carcinoma metastasizing to a malignant mesenchymal tumor has been published.
It is unknown whether metastasis of cancer to cancer is a random occurrence or is
due to selective lodging, survival and growth within another malignant neoplasm.
Metastasis - Breast Carcinoma - Mesothelioma
