My dog has a spot on his foot. Is it a histiocytoma or a tumor?

Thank you for submitting your question regarding Max. I recommend that he sees his veterinarian for a procedure known as a fine needle aspirate. The veterinarian will collect a sample of cells and evaluate them under the microscope to diagnose the mass. A histiocytoma is a common benign growth on the extremities of young dogs. Unfortunately, a mast cell tumor is an aggressive cancerous growth that has the same outward appearance. This is why the cells need to be examined. I hope this information helps!

Hello, and thank you for using PetCoach. I’m seeing a red, round, raised, hairless mass. This appearance would make me primarily suspicious of either a [histiocytoma](https://www.petcoach.co/dog/condition/histiocytoma/) or a [mast cell tumor](https://www.petcoach.co/dog/condition/mast-cell-tumors/). The only way to tell for sure what this lump is, is via cytology. Your vet will get a small sample of cells with a needle and examine them under a microscope to determine what the mass is. I definitely recommend having this done as soon as possible. A histiocytoma is a benign mass that tends to spontaneously resolve. A mast cell tumor would be a concern, and should be surgically removed as soon as possible. I hope this helps!

This looks like it could be a histiocytoma. If it is not bothering her then you can monitor it for a bit to see if it goes away on it's own. If it does not, or it is bothering her, then she should be examined by your vet. ( https://veterinarypartner.vin.com/default.aspx?pid=19239&id=4952066 )

Hello, thank you for using PetCoach. This looks to be a histiocytoma tumor which is a benign tumor commonly found on the limbs and face of dogs. It is a benign tumor that usually will regress on its own within a few weeks/months with no treatment. Of course, I am just guessing. It is impossible to diagnose these things via the internet with just a photo. Here is an information sheet about histiocytomas in dogs for you to read. ( https://vcahospitals.com/know-your-pet/skin-cutaneous-histiocytoma ) He should not be licking the tumor - if he is, you need to get him a cone collar to wear to stop that behavior. If he is just licking the paw, that is not likely related to the tumor and is a different issue. As always, if you are worried, you should take him to your vet for an exam. Best wishes.

Hi there. This is most likely a histiocytoma. They will often regress on their own within a few weeks to a month. My suggestion would be to take Hazel to your vet for an exam so you can get a more definitive diagnosis. Here is a link to an article about this type of mass. http://www.veterinarypartner.com/Content.plx?P=A&S=0&C=0&A=1676 Hope this helps. Best wishes.

If it doesn't seem to bother Peanut, this could be a skin lesion called a histiocytoma (a benign, non-cancerous skin mass). Another possibilty if a reactive insect bite (if it becomes bothersome or gets worse). It is best to have your vet look at it and get samples from it to properly identify this skin lesion. If it is considered to be a histiocytoma (which is very likely), then these usually resolve on their own within 2-4 weeks (self limiting). Only a few require moderate wound management or surgical removal. Best wishes moving forward with Peanuts skin. Take care.

Thank you for submitting your question regarding Bruno. I recommend that he sees his veterinarian. He may need a procedure known as a fine needle aspirate to diagnose the mass. The veterinarian will use a small needle to collect a sample of cells to evaluate under the microscope. This will help to determine the type of mass and guide treatment. A histiocytoma is a common mass on the limb of a young dog. This is a benign growth. However, the outward appearance is the same as a cancerous growth known as a mast cell tumor. In the meantime, place an E-collar on him so that he does not cause any self-trauma. I hope this information helps!