title: A malignant mass in the breast is not always breast cancer.
abstract: A 37-year-old woman presented to the Internal Medicine Clinic with complaints of abdominal pain and constipation which had begun 3 months earlier. A colonoscopy was performed, and wall thickening of the sigmoid colon was detected. A biopsy of the sigmoid colon revealed a poorly differentiated, mucin-producing adenocarcinoma with a signet-ring pattern. No distant metastasis was detected. The patient was treated with chemotherapy consisting of 5-fluorouracil, leucovorin, and oxaliplatin. One and a half years later, a painless mass, which was not fixed to the skin, measuring 1 cm in diameter, was found in the lower outer quadrant of the left breast. A core biopsy of the mass was performed, and a histopathological report confirmed metastasis to the breast from mucinous adenocarcinoma of an intestinal primary.
authors: Department of Clinical Oncology, University of Istanbul, Istanbul, Turkey.
authors: Fatih
authors: F
authors: Selcukbiricik
authors: Deniz
authors: D
authors: Tural
authors: Ayse
authors: A
authors: Bay
authors: Gulcin
authors: G
authors: Sahingoz
authors: Sennur
authors: S
authors: Ilvan
authors: Nil Molinas
authors: NM
authors: Mandel