Using Computed Tomography to Rule Out Cryptorchidism in a Muntjac Deer.

Background: This case describes a Reeves' muntjac deer (Muntiacus reevesi) with a suspected undescended testicle or cryptorchidism. The cryptorchid testicle could not be palpated or visualized with sonography. Contrast-enhanced computed tomography (CT) imaging was performed to avoid an exploratory surgical operation, but no cryptorchid testicle was discovered. The final diagnosis was a singular testicular anorchia.

Discussion: Cryptorchidism and hypogonadism affect a relatively small population of male infants but are the most common male genitourinary anomalies. Identifying the location of the undescended testicle is paramount because surgical intervention should occur before the individual's first birthday. Although sonography and magnetic resonance imaging can help identify the location of undescended testicles, when the testicle is intra-abdominal, surgical intervention often is required to identify or confirm the location.

Conclusion: Although CT is not a first-line imaging modality in human infants with suspected cryptorchidism because of the associated radiation exposure, this case serves as evidence that it might be useful.