title: Benign metastasizing leiomyoma of the uterus.
abstract: Herein, we report on a well-characterized benign metastasizing leiomyoma, presented in an unusual site. Up to the knowledge of authors, so far, only 76 cases of benign metastasizing leiomyoma have been reported. The tumor presented as a retroperitoneal mass three years after a hysterectomy Performed for leiomyomatosis of the uterus with extensive areas of hyalinization. Histopathologic and immunohistochemical studies of the resected mass were similar to the uterine leiomyoma, showing moderate cellularity of bland looking smooth muscle cells with minimal atypia, inconspicuous mitosis, and no necrosis in a hyalinized background.
authors.affiliation: Department of Pathology, Aliasgar Hospital, Iran University of Medical Sciences, Tehran, Iran. rakhshani@ddrcir.org
authors.forename: Nasser
authors.initials: N
authors.lastname: Rakhshani
authors.forename: Mahshid
authors.initials: M
authors.lastname: Hormazdi
authors.forename: Maryam
authors.initials: M
authors.lastname: Abolhasani
authors.forename: Mahmood
authors.initials: M
authors.lastname: Shahzadi
mesh_terms: D003937:Diagnosis, Differential; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007044:Hysterectomy; D007813:Laparotomy; D007889:Leiomyoma / Q000473:pathology* / Q000601:surgery; D008875:Middle Aged; D012086:Reoperation; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis / Q000556:secondary* / Q000601:surgery; D014594:Uterine Neoplasms / Q000473:pathology* / Q000601:surgery