Uterus-like mass in the left broad ligament misdiagnosed as a malformation of the uterus: a case report of a rare condition and review of the literature

Yuan-Jiao Liang, Yuanjiao Liang, Qun Hao, Yuan-Zhe Wu, Yuanzhe Wu, Bo Wu
Fertility and sterility · 2009 · vol. 93(4) , pp. 1347.e13–1347.e16 · doi:10.1016/j.fertnstert.2009.10.040 · PMID:19969294 · W2169929742
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This case report describes a uterus-like mass in the left broad ligament that was initially misdiagnosed as a uterine malformation, highlighting the rarity of this condition.

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Abstract

OBJECTIVE: To describe a rare extrauterine mass of an unknown origin that was composed of smooth muscle with a central cavity lined by endometrium, which resembled a uterus. DESIGN: Case report. SETTING: Academic teaching hospital. PATIENT(S): A 17-year-old girl with severe dysmenorrhea was found to have a uterus-like mass composed of smooth muscle and lined by endometrium in the left broad ligament. INTERVENTION(S): Abdominal surgery. RESULT(S): The mass was successfully removed surgically, and her dysmenorrhea resolved. Histopathological examination revealed that the uterus-like mass was composed of smooth muscle with a cavity lined by endometrial glands and stroma. CONCLUSION(S): The histogenesis of a uterus-like mass is theorized to be a Müllerian system anomaly, metaplastic change, and/or heterotopia. We believe metaplasia is the most likely cause in this case. Alhough rare, it should be considered in the differential diagnosis of dysmenorrhea of uncertain etiology.

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MeSH descriptors

Broad Ligament Diagnostic Errors Dysmenorrhea Uterus Broad Ligament Broad Ligament Dysmenorrhea Dysmenorrhea Female Humans Uterus Uterus

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