Screening Colonoscopy Unmasking Colonic Metastasis from anOccult Breast Ductal Carcinoma: A Case Report and Review ofthe Literature

Metastatic spread from breast cancer to the gastrointestinal tract is rare. Such cases are predominantly lobular carcinomas and theyusually occur later on during the course of disease progression with the stomach being the most common site involved.Furthermore, occult breast primary tumor is extremely uncommon. To the best of our knowledge, we describe here thefirst caseof incidental colonic metastasis asfirst presentation of an occult breast ductal carcinoma. We also provide a review of theliterature on gastrointestinal—and specifically colonic—involvement from breast ductal carcinoma.