title: Primary pulmonary carcinoid tumor with metastasis to endometrial polyp.
abstract: BACKGROUND
  A 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.
  
  
  METHODS
  We 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.
  
  
  CONCLUSIONS
  This 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.
  
  
  CONCLUSIONS
  This is the first case in the literature described a malignant carcinoid metastasis to an endometrial polyp.
authors.affiliation: Mount Sinai School of Medicine, New York, NY, United States. Electronic address: mazdak_mom@yahoo.com.
authors.forename: Mazdak
authors.initials: M
authors.lastname: Momeni
authors.forename: Valentin
authors.initials: V
authors.lastname: Kolev
authors.forename: Dan
authors.initials: D
authors.lastname: Costin
authors.forename: Howard H
authors.initials: HH
authors.lastname: Mizrachi
authors.forename: Linus
authors.initials: L
authors.lastname: Chuang
authors.forename: Richard R P
authors.initials: RR
authors.lastname: Warner
authors.forename: Herbert F
authors.initials: HF
authors.lastname: Gretz