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nekovet, Cat Veterinarian
Category: Cat
Satisfied Customers: 20908
Experience:  Hello, I am a small animal veterinarian. I am happy to answer any questions you may have on any species.
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He has a lump between s shoulder blades under the skin that

Customer Question

He has a lump between his shoulder blades under the skin that at first I thought was an insect bite, it looks like he has been scratching it. He is fine in every other way, eating, bathroom habits, etc.
JA: I'm sorry to hear that. Using the wrong medication for fleas can be dangerous. You should definitely talk to the Veterinarian. What is the cat's name and age?
Customer: Gizmo and he is almost 14
JA: Is there anything else important you think the Veterinarian should know about Gizmo?
Customer: I have only had to take him to the vet about a year ago as he had allergies and was put on antibiotics for about 10 days, other than that, no health problems ever
Submitted: 1 year ago.
Category: Cat
Expert:  nekovet replied 1 year ago.

Hello & welcome, I am Dr. B, a licensed veterinarian and I would like to help you with your wee one today.

How long has it been present?

Is it firm, fluidy, or sore to the touch?

Does it feel attached to the skin (and mobile when you lift the skin) or attached to the muscles underneath?

Has he recently had any injections (ie fluids, vaccines, etc)?

Customer: replied 1 year ago.
About a week and it is attached to the skin and not his body. I can grab the skin and the lump. No injections received
Customer: replied 1 year ago.
It does seem firm but not sore, he has been scratching at it.
Customer: replied 1 year ago.
It does seem like a cyst as I have some sebacious cysts didn't spell that right
Expert:  nekovet replied 1 year ago.

Thank you,

Now as I am sure you can appreciate when we see any lump on our older cats, we do have to consider a range of issues. Still if this is a mass is on the skin level and he hasn't had any recent injections, then we can at least put vaccine reactions and nasty injection site sarcomas to the bottom of our list. That said, if it has been present for a week already and isn't reducing, then we'd also have to drop allergic reactions from stings (even though that could explain the itch) lower on our list as well. Therefore, our main concerns for what you have reported would be soft tissue swelling, abscesses, cysts, and skin based benign or cancerous growths. And I do have to note that if this is growing and stretching the skin that can prompt them to scratch.

Now with these in mind, we can start some supportive care to try and rule out some of these. To start, if there is any chance or a bee/spider/wasp sting or bite, then we can reduce allergic type swelling using antihistamines. Commonly we will use Benadryl (Diphenhydramine; More Info/Dose @ A low dose (ie. 0.25mg per pound of body weight twice daily) is often enough to reduce these signs over a few days. We do usually like to keep the dose low, as they can have drowsiness with this medication (just like people). As well, of course, this medication shouldn't be used if your wee one has any pre-existing conditions or is on any other medication without speaking to your vet first.

Furthermore, to reduce swelling with any of these sudden appearing concerns, you can also start warm compressing this lump. This can reduce inflammation as well as encourage soft tissue inflammation and allergic reactions to settle. Just to note, you can make a safe warmer for use as a warm compress by filling a clean sock 2/3rds full with uncooked white rice. Tie it closed and microwave (approx 1-1.5 min). Before use, do make sure to shake to allow the heat to distribute before using as a compress. (If it cools, you can re-warm as required).

Now if you use the above, but the mass doesn't settle with antihistamine treatment then it does rule allergic reactions. And in that case leaves us with the others to consider for Gizmo. In that case, the best way to approach an abnormal mass like this is to have your vet evaluate the mass via fine needle aspiration (FNA). This is where the vet uses a needle to harvest cells from the mass. If the remove pus, then this tells us that there is infection present and antibiotics can be dispensed. If clear or blood stained fluid is removed, then a cyst will be suspect and can be drained or removed if need be. Or if there is creamy discharge removed, then sebaceous cysts would be suspect and is also cosmetic for them. Otherwise, if the above are not found, then the cells they harvest can be stained and the identity of the nature of the mass can be determined and whether it is something that is concerning or needs more serious treatment.

Overall, to see a lump here at Gizmo's age means we do need to tread with care. Still, we can use the above to rule out some of those aforementioned concerns. Otherwise, if this doesn’t settle; then we’d want to have your vet sample this mass to identify its cause so that appropriate treatment can be initiated to address it for your wee one.

Best wishes,

Dr. B.


If you have any other questions, please ask me – I’ll be happy to respond. Please do rate my service once you have all the information you need as this is the only way I am credited for assisting you today. Thank you! : )

Expert:  nekovet replied 1 year ago.

I'm just following up on our conversation about your pet. How is everything going?