Parasitic leiomyoma of the small bowel mesentery mimicking a gastrointestinal stromal tumor: a case report - Report - MDSpire

Parasitic leiomyoma of the small bowel mesentery mimicking a gastrointestinal stromal tumor: a case report

  • By

  • Shangqin Lin

  • Mingzhe Hu

  • Zhifeng Xu

  • Wei Weng

  • Yaomeng Chen

  • June 2, 2026

  • 0 min

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Clinical Report: A Case Study of Parasitic Leiomyoma in the Small Bowel Mesentery

Overview

This report presents a case of a 38-year-old female with a parasitic leiomyoma in the small bowel mesentery, initially misdiagnosed as a gastrointestinal stromal tumor (GIST). The case underscores the importance of considering parasitic leiomyoma in patients with a history of laparoscopic myomectomy when abdominal masses are detected.

Background

Parasitic leiomyoma is a rare form of uterine leiomyoma that can occur outside the uterus, often as a result of iatrogenic factors such as morcellation during laparoscopic surgery. These tumors can mimic gastrointestinal tumors, complicating diagnosis and management. Understanding this condition is crucial for clinicians, especially in patients with prior uterine surgeries.

Data Highlights

No numerical data or trial data provided in the article.

Key Findings

  • Parasitic leiomyoma can develop from tissue fragments left after laparoscopic myomectomy, particularly with uncontained morcellation.
  • The case highlights the challenge of differentiating parasitic leiomyomas from GISTs based on imaging alone.
  • Histopathological examination is essential for accurate diagnosis of parasitic leiomyoma.
  • Patients with a history of uterine surgery should be evaluated for parasitic leiomyoma when presenting with abdominal masses.
  • Early recognition of parasitic leiomyoma can prevent unnecessary extensive bowel resections.

Clinical Implications

Clinicians should maintain a high index of suspicion for parasitic leiomyoma in patients with a history of laparoscopic myomectomy who present with abdominal masses. Accurate diagnosis through histopathology can guide appropriate surgical management and avoid unnecessary procedures.

Conclusion

This case emphasizes the need for awareness of parasitic leiomyoma as a potential diagnosis in patients with prior uterine surgeries. Proper identification can lead to better patient outcomes and prevent unnecessary surgical interventions.

Related Resources & Content

  1. FDA, Laparoscopic Power Morcellators, 2023 -- Guidance on the use of laparoscopic power morcellators
  2. Uterine leiomyoma mimicking a gastrointestinal stromal tumor: a diagnostic pitfall of CD117 positivity – case report and review of the literature, BMC Women's Health, 2026
  3. Perineal Mass Due to Angioleiomyoma Arising from the Ano-Rectal Wall: A Case Study
  4. Frontiers in Surgery — Case Report: Complete endoscopic submucosal dissection for occult superficial esophageal squamous cell carcinoma concealed by a large esophageal leiomyoma
  5. Mesorectal Solitary Fibrous Tumor: A Case Report and Review of Transanal Minimally Invasive Surgical Resection Literature
  6. Pediatric Inflammatory Myofibroblastic Tumors of the Colon: Clinical Features, Treatment Approaches, and Outcomes—A Case Study with a Comprehensive Literature Review
  7. Laparoscopic Power Morcellators | FDA
  8. Uterine leiomyoma mimicking a gastrointestinal stromal tumor: a diagnostic pitfall of CD117 positivity – case report and review of the literature | BMC Women's Health | Springer Nature Link
  9. Gastrointestinal stromal tumours: ESMO-EURACAN-GENTURIS Clinical Practice Guidelines for diagnosis, treatment and follow-up - PubMed

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