Theriogenology Question of the Month

Katherine A Shuster, Jean A Nemzek-Hamlin, Nichole K Baker, Ingrid L Bergin, Megan H Nowland
Journal of the American Veterinary Medical Association · 2012 · vol. 240(2) , pp. 151–153 · doi:10.2460/javma.240.2.151 · PMID:22217021 · W2024695461
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⚙ AI-generated summary by claude@2026-06+body, 2026-06-08 ⓘ

A 14.5-year-old rhesus macaque with a history of weight fluctuations and a firm uterus was found to have a palpable abdominal mass and hypophosphatemia.

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⚙ AI-generated deep summary by claude@2026-06, 2026-06-10 ⓘ

This JAVMA “Theriogenology Question of the Month” case report evaluated a 14.5-year-old, sexually intact rhesus macaque with a firm caudal abdominal uterine-adherent mass and menstrual-associated weight/BCS fluctuations using physical examination plus radiography and ultrasonography, including color flow Doppler. Imaging and subsequent exploratory laparotomy identified a 4.5 × 3 × 1.5 cm multinodular cystic hemorrhagic mass, and histology showed an endometrioma characterized by endometrial glands/stroma with hemorrhage and hemosiderin-laden macrophages; Doppler demonstrated no blood flow within the mass. The authors note etiopathogenesis is not fully known and that clinical signs can be subclinical or difficult to detect in nonhuman primates, which can contribute to later-stage diagnosis and sequelae. Relevance to endometriosis: the paper’s differential diagnosis and final histologic diagnosis were explicitly endometriosis/endometrioma. This paper is centrally about endometriosis — it reports and characterizes an endometrioma in a rhesus macaque, with diagnostic imaging and histopathology.

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Condition tags

endometriosis

MeSH descriptors

Endometriosis Monkey Diseases Uterine Diseases Animals Endometriosis Endometriosis Endometriosis Female Macaca mulatta Monkey Diseases Uterine Diseases Uterine Diseases Uterine Diseases

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Cites (2)

References (12)

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