What is Retained Testicle?
Usually, while the kitten is still developing in its mother’s womb, the testicles begin to migrate from the abdomen to the scrotum through the inguinal canal. Typically this process is complete between ten days and two months of age, but always by six months of age. Although it is very rare in cats, in some instances this migration process either never begins or it is not completed. When this occurs, one or both testicles remains in the abdomen, becomes lodged in the inguinal canal, or becomes stuck just under the skin in the groin. Any cat that is found to have this condition should receive treatment immediately as the retained testicle or testicles can cause pain and put the cat at a higher risk for developing tumors. Make sure to have all kittens examined by your veterinarian as well as any adult cat that you suspect of having one or both testicles retained.
Retained testicle, which is also called cryptorchidism, meaning “hidden testicle,” is a rare condition in male cats that results in one or both testicles being retained perpetually in the abdomen rather than lowering into the scrotum, which usually occurs by two months of age and always before six months of age. Unilateral cryptorchidism, which is the retaining of one testicle, is much more common than bilateral cryptorchidism, the retaining of both. A cat with only one retained testicle still produces sperm, while a cat with both testicles retained is sterile. Cats with either one or both testicles retained still produce testosterone.
Symptoms of Retained Testicle in Cats
In a kitten, there is generally only one symptom of retained testicle.
- By six months of age, the kitten has one or no testicles in its scrotum rather than the normal two.
When an unneutered adult cat appears to have no testicles in its scrotum, as though it has been neutered, yet still displays the following behaviors, the cat should be examined by a vet to determine if the cat has one or two retained testicles:
- Musky odors
- Sexual behaviors
A cat of any age with one or both testicles retained must be treated immediately as a cat with this condition can experience the following two symptoms:
- Torsion of the spermatic cord, which causes pain
- An increased risk of developing tumors on the abdominal testicle
Causes of Retained Testicle in Cats
Retained testicle is congenital in nature. Some breeds of cats, because of their breeding, are more commonly diagnosed with retained testicle than other breeds.
- Retained testicle occurs more in purebred cats because it is an inherited condition
- Persians and Himalayans are the breeds that are most susceptible to retained testicle.
Diagnosis of Retained Testicle in Cats
Most cases of retained testicle in cats are discovered when kittens are six months in age or younger. Some pet-owners may become concerned, but usually, it is a veterinarian that diagnoses the condition during a visit to the vet for vaccinations.
Your veterinarian may:
- Examine the cat’s abdomen and groin with by hand (palpate) in an effort to physically feel the retained testicle.
- Run blood tests for testosterone levels. This is effective because a cat with no testicles will no longer produce testosterone, while even a retained testicle will continue to produce testosterone. Therefore a cat that appears to have no testicles, yet has testosterone in its blood, must have one or two retained testicles.
- Examine the cat’s penis for penile spines. These markings are evidence of testosterone production. A neutered cat does not exhibit penile spines.
- Perform an ultrasound of the abdomen in an attempt to locate the abdominal testicle.
- Perform an X-ray of the abdomen in an attempt to locate the retained testicle.
Treatment of Retained Testicle in Cats
The preferred treatment for retained testicle in cats is the removal of both testicles, whether in the abdomen or the scrotum, while your cat is under general anesthesia. If there is a testicle in the scrotum, it will be removed in the common procedure for neutering a cat, which is an incision in the scrotum. The abdominal testicle or testicles are generally removed by laparoscopy, which is a minimally invasive surgery that requires as few as two small abdominal incisions. Using laparoscopic tools, the abdominal testicle is removed through one of these incisions.
On very rare occasions, more invasive abdominal surgery may be needed if the testicle cannot be located through laparoscopy.
Placement of Abdominal Testicle
It is technically possible to surgically place the retained testicle into the scrotum. This is not recommended, however, because veterinarians usually deem it best that cats with this genetic abnormality not be allowed to breed.
Recovery of Retained Testicle in Cats
Prognosis is excellent for cats that have been treated for one or two retained testicles. Your cat will likely be sore for as much as a week after surgery. Recovery time will be significantly less after a laparoscopic surgery than after a more invasive surgery. Your vet may prescribe pain medications during this period as well as antibiotics to prevent infection. After kittens heal you will likely observe no difference in their behaviors from before the surgery. Once both testicles have been removed from an adult cat, aggression, spraying, and sexual behaviors should disappear. Although your veterinarian will request a follow up appointment in order to assess your cat’s progress in healing, over the long-term your cat will likely have no further need of veterinary care for this particular condition.
Retained Testicle Questions and Advice from Veterinary Professionals
Is it possible that there could be just one testicle, (the one dropped) and not one hidden inside the abdomen? Is it possible? My cat had surgery for both inside abdomen, and the one dropped. was wondering if that was a necessary surgery since the vet wasn't 100% sure what is was he removed inside his stomach?
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I have a cat that I was told was cryptic and it would cost more to fix him he because of the type of surgery well he is like a tom cat very aggresive and sprays all through the house mounts another male cat we have and does the tom cat cry I found a letter from another cryptic owner that said her cat did the same thing and it was because the cat was not properly fixed when they had the cat checked and operated on again it became a loving cat and stopped all the tom cat symptoms is this possible? could my cat need to be fixed again?
I get that he needs to go back to the vet to have it removed but will the tom cat symptoms aggresivness,spraying,ect subside?
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i adopted a male blind kitten from Greece, he was approx 3-4 months old when i took him to the vet to discuss neutering him, as i have another blind spayed female who i didnt want to be bullied.
The vet examined him and he was booked in the following week, the vet phoned me a few hours later to say that he could only find one testicle and said he needed to operate to find the other one and would be best to do it whilst they had him under the anethstetic. of course i agreed. Later i got a call to say that they couldnt find it and they had to close as he glucose levels dropped. I picked him up later to find a 4inch incision and a bill for £135 instead of the £65 charge. I was also told that he would need to go back in a few months to see if the testicle had dropped or tests-ultrasound etc, possibly see if in the groin.
My question is, shouldnt the vet have left him to see if it would drop on its own. apparently he should have felt that both were there or ultrasound him. obviously it is now a worry that when i go back to a vets i also have a potential large bill again, coming from Greece i am unable to insure him. The vet did not advise me to wait a few weeks until he was older and was billed for a potentially unnecessary operation. please advise me on your thoughts on this matter. Thank you.
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