Abstract:The authors present a rare case of a patient with an estrogen receptor (ER) positive malignant colorectal stricture, with no identifiable primary breast carcinoma. There was demonstrated endoscopic and symptomatic improvement after treatment with letrozole. Gastrointestinal metastases from breast cancer usually present with a previous history of breast cancer, however our patient had no prior or current proven history of breast cancer. Biopsy and immunohistochemical staining of the malignant colonic lesion sho… Show more
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