Lesions of presumed congenital origin in the accessory sex glands of bulls

Cm, Campero; Pa, Bagshaw; Ladds, P. W.

doi:10.1111/j.1751-0813.1989.tb09749.x

Cited by 4 publications

(6 citation statements)

References 10 publications

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“…The findings in this bull show some similarities to previously described cases of bovine segmental aplasia of the mesonephric duct (Saunders and Ladds 1978; Campero et al. 1989).…”

Section: Discussionsupporting

confidence: 88%

“…The findings in this bull show some similarities to previously described cases of bovine segmental aplasia of the mesonephric duct (Saunders and Ladds 1978;Campero et al 1989). Saunders and Ladds (1978) reported unilateral mesonephric duct aplasia affecting four shorthorn bulls, the ampullae were absent in two cases and hypoplastic in the other two.…”

Section: Discussionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

“…This condition is characterized by the partial or complete absence of structures derived from the mesonephric duct, including the epididymis, ductus deferens, ampullae and seminal vesicles (Acland 2001). Both unilateral and bilateral aplasia of the mesonephric duct has been reported in bulls (Campero et al 1989). This communication describes the semen evaluation, ultrasonography and the gross and histological postmortem findings of a case of left unilateral aplasia of the mesonephric duct affecting the epididymal tail and body, seminal vesicles and ampulla of a Holstein Fresian bull.…”

Section: Introductionmentioning

confidence: 99%

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Clinical, Ultrasonographic and Pathological Findings in a Bull with Segmental Aplasia of the Mesonephric Duct

Williams

Revell

Scholes³

et al. 2009

Reproduction in Domestic Animals

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On assessment for use in an AI stud, a 12-month-old bull was found to produce low volume ejaculates with 41% of the sperm having morphological abnormalities. No left epididymal tail was palpable and the head of the epididymis on the left was twice the size compared with the right. Ultrasound examination showed the left testis to contain a large central area of decreased echogenicity, which could be followed proximally to a 15-mm echolucent lesion at the site of the epididymal head. Postmortem examination revealed a 15-mm diameter cyst in the region of the left epididymal head, and absence of the body and tail of the epididymis. The mediastinum testis of the left testis was dilated, corresponding to the area of decreased echogenicity observed on ultrasonography. No left seminal vesicle was present and the ampulla was significantly smaller than the same structure on the right. Histological examination revealed incomplete or absent spermatogenesis involving the majority of seminiferous tubules in the left testis, and a small proportion of those of the right testis. The cystic structure at the site of the left epididymal head was lined by irregular, sometimes attenuated, epithelium and contained sparse spermatozoa. This case demonstrates the adverse impact, which segmental aplasia of the mesonephric duct had on the testicular and epididymal function of a bull, and highlights the importance of careful clinical assessment in its diagnosis.

show abstract

“…The findings in this bull show some similarities to previously described cases of bovine segmental aplasia of the mesonephric duct (Saunders and Ladds 1978; Campero et al. 1989).…”

Section: Discussionsupporting

confidence: 88%

Section: Discussionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Clinical, Ultrasonographic and Pathological Findings in a Bull with Segmental Aplasia of the Mesonephric Duct

Williams

Revell

Scholes³

et al. 2009

Reproduction in Domestic Animals

View full text Add to dashboard Cite

show abstract

“…The condition is characterized by partial or complete absence of structures derived from the mesonephric duct, including the epididymis, ductus deferens, ampullae and seminal vesicles (Foster 2016). Both uni-and bilateral aplasia of the mesonephric duct has been described in the bull McGowan, Holland and Boe-Hansen (Saunders and Ladds, 1978;Campero et al, 1989). These abnormalities are considered to be heritable but the mode of inheritance is poorly understood (Saunders and Ladds, 1978).…”

Section: Prenatal Development Of the Reproductive Systemmentioning

confidence: 99%

Review: Ontology and endocrinology of the reproductive system of bulls from fetus to maturity

McGowan

Holland

Boe-Hansen

2018

Animal

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This review focuses on current understanding of prenatal, prepubertal and post-pubertal development of the male reproductive system of cattle. The critical developmental events occur during the first 3 to 4 months of gestation and the first ~6 to 9 months after birth. The Wilms Tumor-1 and SRY proteins play critical roles in early development and differentiation of the fetal testis, which in turn drives gestational development of the entire male reproductive system. The hypothalamic-pituitary-gonadal axis matures earlier in the bovine fetus than other domestic species with descent of the testes into the scrotum occurring around the 4th month of gestation. An array of congenital abnormalities affecting the reproductive system of bulls has been reported and most are considered to be heritable, although the mode of inheritance in most cases has not been fully defined. Early postnatal detection of most of these abnormalities is problematic as clinical signs are generally not expressed until after puberty. Development of genomic markers for these abnormalities would enable early culling of affected calves in seedstock herds. The postnatal early sustained increase in lutenising hormone secretion cues the rapid growth of the testes in the bull calf leading to the onset of puberty. There is good evidence that both genetic and environmental factors, in particular postnatal nutrition, control or influence development and maturation of the reproductive system. For example, in Bos taurus genotypes which have had sustained genetic selection pressure applied for fertility, and where young bulls are managed on a moderate to high plane of nutrition puberty typically occurs at 8 to 12 months of age. However, in many Bos indicus genotypes where there has been little selection pressure for fertility and where young bulls are reared on a low plane of nutrition, puberty typically occurs between 15 to 17 months. Our understanding of the control and expression of sexual behavior in bulls is limited, particularly in B. indicus genotypes.

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The Male Genital System

Ladds

1993

Pathology of Domestic Animals

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Lesions of presumed congenital origin in the accessory sex glands of bulls

Cited by 4 publications

References 10 publications

Clinical, Ultrasonographic and Pathological Findings in a Bull with Segmental Aplasia of the Mesonephric Duct

Clinical, Ultrasonographic and Pathological Findings in a Bull with Segmental Aplasia of the Mesonephric Duct

Review: Ontology and endocrinology of the reproductive system of bulls from fetus to maturity

The Male Genital System

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