Primary pulmonary carcinoid tumor with metastasis to endometrial polyp

INTRODUCTIONA carcinoid tumor occurring in the endometrium has been documented in the literature, but there is no report in regard to carcinoid tumor metastasis to endometrium.PRESENTATION OF CASEWe report a case of a malignant carcinoid metastasis to an endometrial polyp. Patient underwent hysteroscopy, and polypectomy. The pathology demonstrated an endometrial polyp containing a 4 mm x 5 mm nodule of metastatic carcinoid tumor, consistent with metastasis from patient's known pulmonary carcinoid. The tumor was morphologically similar to the tumors of the right lung, with similar immune-profile.DISCUSSIONThis patient presented with a suspicious pelvic ultrasound. Due to her age, the first priority was to exclude uterine cancer. The endometrial polyp, which was found, had a small focus of metastatic carcinoid tumor. To the best of our knowledge, this finding has not been previously recorded in the literature. Our patient also had a history of metastatic carcinoid tumor to breast. This finding is also very uncommon.CONCLUSIONThis is the first case in the literature described a malignant carcinoid metastasis to an endometrial polyp.