Uterus-like mass: A very rare and elusive entity a case report. Issue 39 (September 2016)

• Record Type: Journal Article
• Authors: He, Jian; Xu, Jie; Zhou, Hong-Yan
• Other Names: Ma. Yufang section editor.
• Is Part Of: Medicine. Volume 95:Issue 39(2016)
• Publication Date: 2016-09
• Subjects: broad ligament -- metaplasia -- uterus-like mass; Medicine -- Periodicals; Medicine -- Periodicals; Médecine -- Périodiques; Geneeskunde; Medicine; Periodicals; Periodicals; 610.5
• DOI: 10.1097/MD.0000000000004961
• Languages: English
• ISSNs: 0025-7974

Abstract

Abstract: Background: Uterus-like mass (ULM) is an extremely rare lesion. Gross morphology of ULM resembling a uterus. It can occur in various organs in the abdominal cavity, even in the spinal cord. The histogenesis of ULM remains uncertain. A number of hypotheses have been proposed including metaplasia, congenital anomaly, and heterotopia theory. Methods: We describe a case of 43-year-old male presented with a complaint of acute low abdominal pain. Pelvic ultrasound found a large pelvic mass embedded in the broad ligament. Results: The mass contains a variable thickness smooth muscle layer lined with endometrial glands and stroma which resembling a uterus. Eventually, the patient was diagnosed as ULM by histopathological examination. Conclusion: Except hypomenorrhea, the patient did not have any other associated abnormalities. We suggest this case supports the metaplasia theory that ULM is a benign mass formed by the proliferation of ectopic endometrial stromal cells or pluripotent mesenchymal cells of the 2nd Müllerian system.