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Abdominal mass in a cat.

Species: Cat
Breed: Persian, angora mix
Age: 8-11 years
My husband and I put down our Ivy today. It was rather sudden and unexpected and now I am troubled and regretting our decision.
Ivy was 11 years old, a playful troublemaker that had no interest in listening or obeying you. But none the less we loved her. This past tuesday I noticed she was acting "off". She wasn't in her usual places, and I had not noticed her eating or using the litter. Although things were difficult to tell because we have another cat. Wednesday came, and still nothing. I even physically took her to her food and nothing. She was not much of a lap cat, and we didn't really get to check her out very often. I noticed that she had lost quite a bit of weight and that her back end was very bony. She was matted, and had some bald patches, and she smelt of urine all over. She wasn't wet at all and there was no evidence of her going to bathroom.
Her drinking had been fine, or so I think. But she would only drink out of the running faucet, toilet bowl, shower.
We took her to the vet today with the understanding that it was probably a kidney issue and were prepared to make an appropriate decision. The vet told us the usual, need blood work, urine test and she also mentioned hat there was a mass in her abdomen. She said it could be the obstruction in the bladder or a tumor in the kidney for which we would need an X-ray too.
We are not in the best financial situation, and I didn't want to waste hundreds and hundreds of dollars to just tell me that any treatment plan would cost the same and may not help. After an hour in the office we came to extremely difficult decision to euthanize her. Our reasoning for this included,..
Weight loss from 9 lbs in 2008 to 6lbs now
Longevity with or without treatment
Behavior, although the change was very recent
Stress, we have another cat at home that is usually the docile one except when Ivy came home from being somewhere ( vets, grooming ) then she just tormented her for days
Ivy also had her own anxiety, didn't like leaving her own environment. She was deemed "handle with caution in her file from an early age". She would hiss, cry, get quite vocal and would usually soil herself when we went to the vet. She needed sedation to be groomed and needed to be sedated before being euthanized.

So here the time has come, the vet assures me ( with hesitation ) that we are doing the best thing. It's done, and then I asked to feel the mass she found. She felt for it again and told me she was almost sure that it was a very large kidney tumor. That calmed me for a bit.

Now, I am emotionally distraught over our decision. What if it was just a benign mass, what if it was a thyroid issue or diabetes that we could have managed quite easily. I guess my regret is not having any testing done to tell us something as least. I feel guilty that I pushed for this because of money issues. She was our cat and I never though that I loved her as much as I do.
I'm sorry for the long winded story. My question is given that there was really no proof of anything, did I make a very serious mistake?
Thank you in advance, Katherine

Online vet, Dr. Marie

Dr. Marie replied:

I'm so sorry for your loss. It's never easy to make the decision to euthanize a pet, no matter what the circumstances are.

From what you have written I can tell you that you definitely made the right decision.

It is extremely unlikely that the mass in Ivy's abdomen was benign. The most likely explanation is a kidney tumor and if a kidney tumor has gotten to the point where it is causing a cat to lose weight and not feel well then it is extremely unlikely that you would have been able to do anything to help. In the best case scenario, with some tests and a few days of IV fluids it's possible you could have bought her some more time but it would likely have only been days or weeks.

If this wasn't a kidney tumor, it's possible it was a condition called polycystic kidneys. This is a genetic condition that persians can get. Some cats can live with this condition for many years(and have a very large kidney) but once it gets to the point where it is causing kidney failure then it is almost always fatal.

If I see an older cat who has lost weight, who is not feeling well, who has an abdominal mass I always offer diagnostic tests to my clients. But I also know that these symptoms are almost always a sign of something fatal.

The chances that this was something "fixable" are extremely small. Please don't feel guilty. You did what you could for Ivy and gave her the gift of not having to suffer a horrible end to her life.

I'm so sorry for your loss.

Dr. Marie

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Disclaimer: Although Dr. Marie is a qualified veterinarian, the information found on this site is not meant to replace the advice of your own veterinarian. and Dr. Marie do not accept any responsibility for any loss, damage, injury, death, or disease which may arise from reliance on information contained on this site. Do not use information found on this site for diagnosing or treating your pet. Anything you read here is for information only.

Customer reply:

Thank you for your response. I'm also wondering whether or not you think that it may have been a thyroid or diabetes issue. And what the treatments plans for those would be in best and worst case .
I'm still quite a mess about our decision, mostly because I have no closure.
Awaiting your response, thanks.

Online vet, Dr. Marie

Dr. Marie replied:

Hi Katherine. Neither hyperthyroidism or diabetes would produce an abdominal mass. Now, it is in theory possible that the mass was a large kidney that Ivy could have lived with and that there was something else going on. But it doesn't sound like it to me.

Cats with hyperthyroidism will have a voracious appetite. This wasn't the case with Ivy. Also, in most cases, if a cat is hyperthyroid, the vet should be able to feel a large thyroid gland in the neck region.

Diabetes is almost impossible with what you have described. Cats with diabetes are extremely thirsty to the point where they live camped out at the water dish. You mentioned that Ivy was drinking a normal amount and that she would only drink from certain areas, so this does not sound like a diabetic cat at all.

Really, you did make the right decision.

Dr. Marie

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Dr. MarieDr. Marie is a veterinarian who practices in a busy animal hospital in Ottawa, Ontario. She created Ask A Vet Question as a resource for good, accurate veterinary advice online. Dr. Marie treats dogs, cats, hamsters, guinea pigs, and rats. She has been a vet since 1999.

Is an online vet visit just as good as a trip to your veterinarian? No! But, many times, asking an online veterinarian a question can help save you money. While Dr. Marie can't officially diagnose your pet or prescribe medications, she can often advise you on whether a vet visit is necessary. You can also ask Dr. Marie for a second opinion on your pet's condition.