A Rare Case of Metastatic Mucinous Breast Carcinoma as a First Presentation of Colon Cancer in a Male Patient: Case Report and Review of the Literature

The majority of breast tumors are primary; however metastatic tumor to the breast from extramammary sites has an incidence of 0.5 to 3% and can be misinterpreted clinically as a primary breast tumor. We report a case of metastatic mucinous breast carcinoma as a first presentation from colon cancer in a male patient who hasn’t had any bowel symptoms. The immunohistochemical study helped in suspecting the diagnosis, which was then confirmed by CT scan abdomen and pelvis and endoscopic biopsy of the colonic lesion. Management of such patients usually by palliative chemotherapy due to the aggressive nature of the disease however, surgical intervention may be indicated in symptomatic patient or risk of tumor ulceration as in our patient.