My dog has a lump. Should we get a needle aspirate before surgery?

Some types of growths are not able to diagnosed with an aspirate, and require a biopsy for diagnosis. It could be that your vet is concerned that based on the appearance and the way it feels (hard and fixed) that the growth is malignant, and removal is the best option instead of doing an aspirate. More than likely, your vet will send the growth on Koda to the lab for a biopsy after removal. It can happen that the vet decides to remove a growth without doing an aspirate, so this is a normal occurrence.

Hi and thanks for posting! If it is a small mass, taking a biopsy may be hard to do. They do need a fairly good and complete piece of tissue to properly evaluate it. Sometimes if small masses are concerning from appearance to your veterinarian, they may recommend just removing it completely and sending off the tissue to a pathologist for evaluation. I hope this helps!

Needle aspiration of lipomas typically yields identifiable fat so i agree with your family vet that it is concerning to not have any material recovered with the needle aspirate. We always start with needle aspiration as it is non invasive with quick results but some masses are harder to diagnose with this test. This typically occurs if the mass is firmer in nature. Going to see a specialist can be helpful as we can sometimes use other techniques such as ultrasound to obtain samples with needle aspiration to try to avoid biopsy. But ultimately biopsy may be necessary for some masses. I hope this helps and thank you for using Petco Pet Education Center, formerly Petcoach!

I am assuming that your vet did a needle aspirate and wasn't able to get a diagnosis. The only way to know the cause of the lumps would be to remove them and submit to a lab for biopsy. As long as he is otherwise healthy then the risk of anesthesia is low. If he needs a dental cleaning then your vet could do both at the same time. If you don't want to have them removed then you could monitor for a month or so and see how the lumps change. If they are growing then they really should be removed.

Very small masses can be tricky to get enough of the needle in the mass without going through it. This area of the body can be tricky to get enough margins due to the lack of tissue before you hit bone, and the movement in the joints makes closure difficult. It could be any number of soft tissue masses, including a wart, mast cell tumor, squamous cell carcinoma, etc. If your vet cannot get enough cells for diagnosis with a fine needle aspirate, simply taking a surgical biopsy without removing the entire mass is an option. When we do bloodwork prior to anesthesia, we are checking the liver and kidney values are normal, no anemia or signs of infection, adequate protein levels, etc. we just want to be aware of any issues inside the body to be able to adjust anesthetic protocols.

Hello, and thanks for using Petco Pet Education Center, formerly Petcoach. A needle aspirate is the standard way to get an initial "suspected" diagnosis on a lump, but there are limitations to what a needle sample can tell us. If the cells in the needle sample appear worrisome, then the next diagnostic step is to send in a biopsy (surgical "chunk") of the tumor, or to remove the tumor itself and send the whole thing in to the lab for analysis. So, was removal of the ear necessary? I can't say, I don't know enough about the location or size of the mass. I didn't see the slide from the initial needle aspirate. But if the needle aspirate looked worrisome, and the next step is to remove the tumor or cut a piece of the tumor off, then removing that piece of the ear may have been the only way to find out for sure what the tumor was, and whether surgical removal was curative. Rather than regretting in hindsight that the surgery was done because the histopathology report came back as a histiocytoma, I would be focusing on the good news that Tate doesn't have a malignant mast cell tumor. And removal and lab analysis of the tumor was the only way you could have gotten that news. Hope this helps!

I would recommend having an biopsy done on the lump on Nanook. There are types malignant cancers that can't be diagnosed with a fine needle aspirate, and can only be diagnosed with a biopsy. It's always important to have any suspicious lumps diagnosed, so in case it is a malignant cancer, it can be treated right away. It does happen that dogs will not show any signs of being sick from cancer until after the cancer has spread or a tumor has ruptured. I think having it biopsied is a good idea.