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Open Access Infertility in CFW/R1 Mice Associated with Cystic Dilatation of the Bulbourethral Gland

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A third of male inbred CFW/R1 mice in a breeding colony developed subcutaneous, bilateral, perineal masses determined to be cystic bulbourethral glands. The masses developed in mice between 4 and 15 months of age. After development of these perineal masses, diseased males were unable to produce offspring. Gross examination revealed the masses impinging on the scrotum and displacing the testes into the inguinal canal. The perineal masses were paired, membranous, translucent cysts, 6 to 10 mm3, attached to the bulbocavernosus muscle and connected to the pelvic urethra by way of a non-patent duct. The cysts contained a clear to tan, minimally cellular, viscous fluid with high mucus content, as documented by examination of Wright Giemsa-stained cytologic preparations. Histologic examination of hematoxylin and eosin-stained sections revealed cystic tubuloalveolar glands surrounded by striated muscle and lined by a single layer of pyramidal cuboidal to columnar epithelial cells with pale, basophilic, lacy cytoplasm and round, basal, condensed nuclei. These gross and histopathologic findings were consistent with cystic dilatation of the bulbourethral gland.

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Document Type: Case Report

Affiliations: 1: Research Animal Diagnostic Laboratory, Department of Veterinary Pathobiology, University of Missouri, Columbia, Missouri 2: National Institutes of Health, Veterinary Medicine Branch, Veterinary Resources Program, Bethesda, Maryland 3: Life Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee

Publication date: June 1, 2002

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  • Comparative Medicine (CM), an international journal of comparative and experimental medicine, is the leading English-language publication in the field and is ranked by the Science Citation Index in the upper third of all scientific journals. The mission of CM is to disseminate high-quality, peer-reviewed information that expands biomedical knowledge and promotes human and animal health through the study of laboratory animal disease, animal models of disease, and basic biologic mechanisms related to disease in people and animals.

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