Diagnosing and Dealing with a Rig

Question 1

Diagnosis of Cryptorchidism

Answer 1

Scrotal & inguinal regions should be palpated carefully
Rectal Examination- Not advised
Diagnostic Imaging
Hormonal assays

Question 2

Name of hormone used to diagnose a rig

Answer 2

Anti-mullerian Hormone (AMH)

Question 3

Is Antimullerian hormone higher or lower in cryptorchid stallions or geldings

Answer 3

Serum concentrations of AMH are significantly higher in cryptorchid stallions than in geldings, in which AMH concentrations are low to undetectable

Question 4

Outline Testosterone and oestrone Sulfate Concentration to test for a rig

Answer 4

Horse is cryptorchid if conc both before & after hCG administration is > 100 pg/mL
Horse is a gelding if conc in both samples is < 40 pg/mL

Question 5

Treatment of rigs

Answer 5

Laparotomy- Technique of choice
Cryptorchid Castration- Inguinal Approach
Hormonally-Induced Descent