Comparison of hormonal methods for diagnosis of cryptorchidism in horses

Arighi, M; Bosu, W.T.K.

doi:10.1016/s0737-0806(89)80112-1

Cited by 41 publications

(34 citation statements)

References 12 publications

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“…According to Voermans et al . (), cut‐off value to confirm a castration is <0.09 nmol/l and according to Arighi and Bosu (), concentration of ≤0.83 nmol/l is diagnostic of absence of testicular tissue.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of success rate of laparoscopic castration without orchidectomy in 32 mature horses

Fourmestraux

Geffroy

Siliart

et al. 2013

Equine Veterinary Education

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Summary The surgical success of laparoscopic castration without orchidectomy results from avascular necrosis of the testes. However, failures and subsequent production of testosterone and stallion‐like behaviour have been previously identified. Laparoscopic castration without removal of the testes was performed in 32 horses with 2 normal descended scrotal testes between July 2006 and October 2012. The objectives of our study were to evaluate the success rate of laparoscopic castration without orchidectomy on descended testes in our population and assess complications and recovery time. Endocrine tests were performed after surgery and owners also asked to report on their horse's behaviour and ability to resume exercise. Castration was deemed successful if endocrine test results were in accordance with gelding values. Failed horses were castrated using a conventional technique and histology performed when possible. Basal testosterone levels decreased below 3 nmol/l after surgery in 30/32 cases. However, in 2 horses, stallion behaviour persisted and histological evaluation after inguinal castration showed residual viable tissue. Two horses maintained high testosterone levels after surgery associated with stallion‐like behaviour. Based on these results, 12.5% of horses (4/32 horses) failed to be considered a gelding based on either endocrine tests and/or histology. All horses, with one exception, were able to resume exercise less than a week after the procedure. Laparoscopic castration without orchidectomy appears to be a safe procedure. When assessing the success of laparoscopic castration, our total failure rate was 12.5% (4/32 horses) which is significantly higher than previously reported.

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Section: Discussionmentioning

confidence: 99%

Evaluation of success rate of laparoscopic castration without orchidectomy in 32 mature horses

Fourmestraux

Geffroy

Siliart

et al. 2013

Equine Veterinary Education

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“…The hCG stimulation test is reported to be 94.6% accurate in detecting the presence of testicular tissue (Cox 1975). Because the hCG test relies on the response of Leydig cells, the response to hCG stimulation in horses less than age 18 months and during the winter is poor; in these instances, an additional serum sample obtained 24 h after hCG administration may assist in detecting the presence of testicular tissue (Arighi and Bosu 1989).…”

Section: Diagnosismentioning

confidence: 99%

Cryptorchidism in horses

Mueller

Parks

1999

Equine Veterinary Education

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“…O criptorquidismo é mais comum do que o monorquidismo, sendo o diagnóstico definitivo obtido apenas após exploração cirúrgica abdominal, remoção do testículo contralateral e dosagem hormonal (ADAMS, 1990;SEARLE et al, 1999). O exame hormonal inclui dosagem de testosterona basal e dosagem de testosterona após estimulação com gonadotrofna coriônica humana (hCG) (ARIGHI et al, 1989;STRONG et al, 1997). A dosagem de testosterona basal seguida da estimulação com hCG em equino com mais de 18 meses de idade é o melhor indicador da presença de tecido testicular vital (SEARLE et al, 1999).…”

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“…A concentração basal de testosterona pode variar muito nos equinos, levando a conclusões erradas a respeito da presença de tecido testicular. A concentração basal de testosterona associada à estimulação com hCG parece ser o teste mais utilizado e que possui maior confiabilidade nos resultados em equinos com mais de 18 meses de vida e, em países que têm um inverno muito frio, o teste possui maior confiabilidade nos meses mais quentes (ARIGHI et al, 1989, SCHUMACHER, 1992. Essa associação no teste hormonal também foi utilizada por STRONG et al (1997) e PETRIZZI et al (2004.…”

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