Cryptorchidectomy and Ovariectomy in Horses Flashcards
What is the period of normal testicular descent in horses?
10d before and after birth
What is the more typical location for an inguinal crypto testes in a horse? Abdominal? What about for ponies
Inguinal: R
Abdominal: L
Reversed in ponies
Why is persistent stallion-like behavior not a good indication of cryptorchidism?
Behavior is partially learned
What is the new gold standard for dx cryptorchidism?
AMH
How will hCG change when exogenously given to a cryptorchid (or intact) horse?
Testosterone increases
What estrogen levels indicate cryptorchidism?
> 400pg/mL
What testosterone levels indicate cryptorchidism?
> 100pg/mL
What is the most common sx approach to cryptorchidism in the field?
Inguinal approach
What is the approach of choice for abdominal cryptorchidectomy, prior attempts at castration, or unknown location of testis?
Standing laparoscopy
Benign, slow growing, unilateral, hormonally active tumor
GCT
What abnormal behaviors do mares show if they have a GCT?
Anestrus, stallion-like behaviors, nymphomania
How do you dx a GCT?
AMH >4ng/mL
What will a GCT look like on ultrasound?
Honeycomb
What is the best choice sx approach for removal of ovaries?
Standing laparoscopy
How do you extract the ovary from the abdomen?
Morcellation, flank/ventral midline laparotomy
