One hundred and twenty-seven horses with 141 cryptorchid testes were identified.
Eighty-five testes were identified inguinally: 56 abdominal.
Two inguinally retained testes were not observed on ultrasound (false negatives) and 2 testes were considered inguinal but subsequently had to be removed from the abdomen (false positives).
Sensitivity of inguinal ultrasound to predict the location of cryptorchid testes was therefore 98% and specificity 97%.
The technique described herein proved a reliable technique to locate cryptorchid testes prior to surgery, minimising morbidity and cost.
Suspect cryptorchids with no external evidence of testes should undergo a screening blood test prior to this ultrasound method of diagnosis.
Source: Coomer, R. P. C., Gorvy, D. A., McKane, S. A. and Wilderjans, H. (2016), Inguinal percutaneous ultrasound to locate cryptorchid testes. Equine Veterinary Education, 28: 150–154. doi: 10.1111/eve.12419
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