I Found a Lump on My Cat's Abdomen

CatChannel veterinary expert Arnold Plotnick, DVM, explains what to do when your cat has a mysterious lump.

Posted: September 3, 2010, 3 a.m. EDT

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Q: I noticed that my cat seems to have a lump/growth on the lower left side of her stomach. She doesn't seem to be bothered by it. She seems to eat, run, jump, play, urinate and defecate like a healthy cat.

A: I suspect you mean there's a lump on the abdomen (her “belly”) rather than her stomach (the organ located inside her abdomen). I’m glad that she doesn’t seem to be bothered by it, but it still needs to be evaluated by your veterinarian. I cannot tell from your description if this lump is contained within the skin, or if it involves the tissues just beneath the skin. Either way, a vet should examine it. Your vet may want to aspirate the mass — insert a needle into it, suck back some of the cells from the mass into the hub of the needle, and then spray them onto a microscope slide. The vet mails the slide to a laboratory and a cytologist evaluates it to determine if it is benign, or if the lump is dangerous and needs to be removed. Most skin masses are benign, but better to play it on the safe side and have it looked at.

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Reader Comments

Jackie    Tupelo, MS

4/21/2015 6:55:57 PM

My cat has the same situation. Last spring she lost hair around her tail. Grew it back in winter and now this spring she has lots around hind quarters & tail. Could this be related to the belly growth? The vet does keep a check on the lump to make sure it is not growing. She gave her a steriod shot for hair loss but she has only gotten worse.

cayla    cincinnatus, NY

4/20/2015 2:28:54 PM

my cat has the same thing and she don't seem to be botherd
by it either but im taking her to the vet. im thinkng
it might be a tumer

Tanja    International

12/6/2014 10:11:09 AM

I found a while ago a lump on my cats belly on the place where nipples suposed to be right between her legs. she is also not bothered by it, play, eat, run, sleep. no vomitting. she is 7 months old and i would really want to know is it normal for a cat to have that or not? I apologize for my grammar, english is my other language. Thank you.

Ruth    Fredericktown, MO

11/11/2013 10:48:23 AM

I was doing a search on this specific topic when I came across this site.
My cat Cuddles, is a 7 year old Main Coon. I had noticed a small lump in her lower abdomen a few years ago, which we figured was scar tissue from getting her spayed at 6 months of age.
I notice a couple of weeks ago, while 'really' examining her, while she was eating, and discovered a large mass in her lower abdomen! I was mortified! So on Monday I called our vet to see about bringing Cuddles in to be examined & got an appointment for tomorrow afternoon. Should I be afraid of what I might be told about the mass? I'm really scared for her.

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