title: Metastatic low-grade endometrial stromal sarcoma of the sigmoid colon three years after hysterectomy.
abstract: A 49-year-old woman, who had undergone hysterectomy for low-grade endometrial stromal sarcoma (ESS) 3 years ago, presented with a 2-wk history of lower abdominal pain. Barium enema and sigmoidoscopy disclosed a polypoid submucosal tumor. Histopathologic features of biopsy specimens from the lesion were similar to those of the resected uterine ESS. Under the diagnosis of metastatic ESS of the sigmoid colon, sigmoidectomy was performed. Microscopic examination demonstrated dense proliferation of spindle cells with little nuclear atypia, which were sometimes arranged in whorled pattern around abundant arterioles. Mitotic count is below 1 in 10 high-power fields. Immunohistochemically, the neoplastic cells were strongly positive for vimentin, estrogen receptor and progesterone receptor but negative for alpha-smooth muscle actin, S-100 protein and CD34. Thus, a final diagnosis of low-grade ESS metastasis to the sigmoid colon was made. Her postoperative course was uneventful and hormonal therapy with progestational agents is entertained.
authors.affiliation: Second Department of Internal Medicine, Nagasaki University School of Medicine, 1-7-1 Sakamoto, Nagasaki, Japan.
authors.forename: Yuki
authors.initials: Y
authors.lastname: Asada
authors.forename: Hajime
authors.initials: H
authors.lastname: Isomoto
authors.forename: Fumitaka
authors.initials: F
authors.lastname: Akama
authors.forename: Noriko
authors.initials: N
authors.lastname: Nomura
authors.forename: Chun-Yang
authors.initials: CY
authors.lastname: Wen
authors.forename: Haruhiko
authors.initials: H
authors.lastname: Nakao
authors.forename: Ikuo
authors.initials: I
authors.lastname: Murata
authors.forename: Kan
authors.initials: K
authors.lastname: Toriyama
authors.forename: Shigeru
authors.initials: S
authors.lastname: Kohno
mesh_terms: D012809:Colon, Sigmoid; D003110:Colonic Neoplasms / Q000556:secondary*; D016889:Endometrial Neoplasms / Q000473:pathology* / Q000601:surgery; D005260:Female; D006801:Humans; D007044:Hysterectomy; D008875:Middle Aged; D018203:Sarcoma, Endometrial Stromal / Q000556:secondary*; D013997:Time Factors