Uterus-Like Mass Arising in the Broad Ligament

A A Ahmed, Ahmed AA, Ahmed A. Ahmed, Swan RW, Robert W. Swan, R W Swan, Amy Owen, A Owen, Owen A, F T Kraus, Kraus FT, Frederick T. Kraus, F Patrick, Patrick F, Frank Patrick
International journal of gynecological pathology : official journal of the International Society of Gynecological Pathologists · 1997 · vol. 16(3) , pp. 279–281 · doi:10.1097/00004347-199707000-00015 · PMID:9421095 · W1992859593
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⚙ AI-generated summary by gemini-2.5-flash-lite, 2026-06-07 ⓘ

This paper describes a rare uterus-like mass found in the broad ligament of a 46-year-old woman, hypothesizing it originates from mesenchymal cells capable of duplicating Müllerian duct structures.

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This case report describes a 46-year-old woman with a large abdominopelvic mass originating from the posterior leaf of the right broad ligament. Histological examination revealed that the cystic lesion was lined by endometrial-like tissue and surrounded by smooth muscle resembling myometrium, with focal areas showing features comparable to adenomyosis. The authors hypothesize that such masses may develop from subperitoneal mesenchymal cells capable of duplicating Müllerian duct structures or result from Müllerian duct fusion defects. Relevance to endometriosis: listed as one indication for GnRH antagonists, though the paper's main focus is uterine fibroids.

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Abstract

A 46-year-old woman presented with a large abdominopelvic mass. Exploration revealed a large cystic mass that arose from the posterior leaf of the right broad ligament. The mass was lined by endometrial-like tissue and had an outer layer of smooth muscle that resembled myometrium. The inner wall was focally composed of a thick layer of intermixed smooth muscle and endometrial glands comparable to adenomyosis. This is the fourth reported case of "a uterus-like mass" and the first that is clearly extraneous to the ovary. We hypothesize that these masses may arise from subperitoneal mesenchymal cells that retain the ability to duplicate mullerian duct structures; other cases may represent mullerian duct fusion defects.
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Case Report: PDF Only Uterus-Like Mass Arising in the Broad Ligament A Metaplasia or Mullerian Duct Anomaly? - Ahmed Ashour Ahmed - Robert W. Swan - Amy Owen - Frederick T. Kraus - Frank Patrick International Journal of Gynecological Pathology 16(3):p 279-281, July 1997. Summary A 46-year-old woman presented with a large abdominopelvic mass. Exploration revealed a large cystic mass that arose from the posterior leaf of the right broad ligament. The mass was lined by endometrial-like tissue and had an outer layer of smooth muscle that resembled myometrium. The inner wall was focally composed of a thick layer of intermixed smooth muscle and endometrial glands comparable to adenomyosis. This is the fourth reported case of “a uterus-like mass” and the first that is clearly extraneous to the ovary. We hypothesize that these masses may arise from subperitoneal mesenchymal cells that retain the ability to duplicate mullerian duct structures; other cases may represent mullerian duct fusion defects. Copyright ©1997International Society of Gynecological Pathologists

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Condition tags

adenomyosis

MeSH descriptors

Broad Ligament Mullerian Ducts Uterus Broad Ligament Endometrium Endometrium Female Humans Metaplasia Metaplasia Middle Aged Mullerian Ducts Muscle, Smooth Muscle, Smooth Uterus

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