Testicular hypoplasia in a bull with XX/XY chimerism
A 4-year-old 1/2 Hereford X Bos indicus bull displayed XX/XY chimerism associated with arrested spermatogenesis. Phenotypic examination revealed underdeveloped dorsal neck muscles, a non-pendulous scrotum, testes firm in consistency and a scrotal circumference measurement of 27 cm. On rectal palpati...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
New York State College of Veterinary Medicine
1981
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| Online Access: | http://psasir.upm.edu.my/id/eprint/39547/ http://psasir.upm.edu.my/id/eprint/39547/1/Testicular%20hypoplasia%20in%20a%20bull%20with%20XXXY%20chimerism.pdf |
| Summary: | A 4-year-old 1/2 Hereford X Bos indicus bull displayed XX/XY chimerism associated with arrested spermatogenesis. Phenotypic examination revealed underdeveloped dorsal neck muscles, a non-pendulous scrotum, testes firm in consistency and a scrotal circumference measurement of 27 cm. On rectal palpation, small seminal vesicles were present and only azoospermic seminal fluid was collected at 3 monthly electroejaculations. Chromosome analysis on 2 monthly batches of leukocyte cultures showed a mean chimeric ratio of 80% of XX:20% XY cells. Cells cultured from skin were all male. Histopathological examination of both testes revealed reduction in size and number of tubules, marked hypoplastic germinal epithelium showing only spermatogonia and a well defined interstitium with large quantities of collagen. The small size of the testes and histological changes were suggestive of a testicular hypoplasia. |
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