Metastatic Invasive Lobular Breast Carcinoma Involving Tamoxifen-related Endometrial Polyp in a Patient With Metachronous Bilateral Breast Carcinomas: A Case Report

Although rare, breast carcinoma may metastasize to endometrial polyps. Clinicians and pathologists should consider this possibility when evaluating abnormal ultrasonographic findings in the female genital tract, particularly in patients with a history of breast carcinoma receiving tamoxifen therapy. Abnormal ultrasonographic findings in the uterus of such patients warrant a comprehensive diagnostic workup to exclude metastatic disease.