Stromal tumors
Parasitic leiomyoma

Author: Nat Pernick, M.D. (see Authors page)

Revised: 9 February 2017, last major update August 2011

Copyright: (c) 2002-2017, PathologyOutlines.com, Inc.

PubMed search: parasitic leiomyoma uterus

Related topics: leiomyoma

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Cite this page: Parasitic leiomyoma. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/uterusleiomyomaparasitic.html. Accessed July 22nd, 2019.
Definition / general
  • Present as peritoneal pelvic benign smooth muscle masses separate from the uterus
  • Likely originates as pedunculated subserosal leiomyoma which twists and torses from uterine pedicle
  • As a "free" mass in peritoneal cavity, it survives by recruiting neovascularization from adjacent omentum, pelvic wall and other sites
  • Associated with laparoscopic myomectomy and morcellation (Fertil Steril 2011;96:e90, Obstet Gynecol 2009;114:611)
  • Typically does NOT refer to parasites associated with leiomyomas: Dracunculus / guinea worm in broad ligament (Am J Surg Pathol 1993;17:937), Schistosoma mansoni in leiomyoma (Clinics (Sao Paulo) 2007;62:529)
  • Make diagnosis with great caution, because smooth muscle neoplasms arising in retroperitoneum and GI tract with recurring or metastatic potential are notorious for being bland and having no/few mitotic figures
Case reports
Clinical images

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Parasitic leiomyoma of omentum

Gross images

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Calcified mass

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