Why does my 4-month Doberman puppy have a hard lump on his back?

Hello, thank you for using PetCoach. Chances are that this is a sebaceous cyst. Sebaceous cysts are usually harmless, sack-like growths with a lining that is not cancerous. In dogs, most cysts develop from hair follicles. These cysts typically appear as single, clearly defined, firm or soft lumps located in the skin or just beneath it. They are often between 0.5 to 5 centimetres in size and may sometimes have a bluish colour. A cyst can release a thick, gray-to-yellow-brown cheesy substance if it bursts. Other terms for sebaceous cysts in dogs include infundibular or follicular cysts. The lump needs to have a fine needle aspirate (FNA)/cytology to be sure of that diagnosis. Here is a link about the procedure and why it is done. It does not require anesthesia. ( https://vcahospitals.com/know-your-pet/cytology-fine-needle-aspiration-fna ) If it is a sebaceous cyst, it will be very obvious once the vet introduces the needle into the lump. Hope this helps. Best wishes.

Thanks for using Petco Pet Education Center, formerly Petcoach! This could be a benign or malignant growth. This could even be an abscess. There is no way of knowing what it is just based on its appearance. This is often differentiated by a test called a fine needle aspirate (FNA) which is a pain free, inexpensive and easy procedure which in most cases will help reach a diagnosis. Sometimes a biopsy is needed for a definitive diagnosis. I recommend that you have him evaluated by your veterinarian for further assessment and treatment. I am really hoping for something benign. Good luck and have a good night!

No puppies don't get fatty lumps like this overnight, so it's more likely a cyst or an abscess on Franko. A cyst and an abscess are not serious, but I would still have it checked out by a vet before his next round of vaccines. The vet can do a fine needle aspirate on it. To do this, the vet sticks a small needle into the lump to get a sample of it's cells, and examines the cells on a slide under a microscope. It's usually painless to the animal, and relatively quick to perform. Once the cause of the lump is diagnosed, the vet can discuss treatment options.

If your dog has recently been vaccinated, this lump could be a vaccine granuloma and will go away on its own. However since the lump has grown quickly, you may want to have it healed out by your veterinarian. The vet can do a fine needle aspirate of the lump and look at the cells under a microscope and then may be able to determine what is causing the lump. I hope this helps. Thanks for using Petco Pet Education Center, formerly Petcoach. Best of luck.

Hi and thanks for posting on Petco Pet Education Center, formerly Petcoach! I am sorry Cooper has a lump over his neck! it is hard to say exactly what the cause is without examining Cooper first, but if he recently had a vaccine in that area, it may be an inflammatory reaction due to the vaccine that was given. There are other causes as well much as a small tumor or other mass. I would recommend Cooper see his veterinarian for a closure inspection and to have a sample of the mass taken to determine what it is and if it needs to be removed or not. I hope this helps and thanks for using Petco Pet Education Center, formerly Petcoach!

In a young dog these are often a little cyst or a mass known as a histiocytoma. These may grow a little bigger, but eventually go away on their own after a couple of months. I think it would fine to just monitor this for now. If grows rapidly, or breaks open, or has any other dramatic changes, then it's best to have your vet examine Capone in order to definitively diagnose the cause of this and provide the necessary treatment. Below is a link to more information about the suspected mass. https://vcahospitals.com/know-your-pet/skin-cutaneous-histiocytoma I hope that helps and all is well with Capone.

Has he been licking at it? Can you identify a wound on it? It may be an abscess (localized infection) under the skin, as thise can show up very quickly. You can shave the hair over the top and clean it with dilute Betadine (available at any pharmacy - use water to dilute it so it looks like tea). Put an ecollar (cone) on him to prevent him from biting or chewing on it, and make an appointment with your vet as soon as you can—but it’s not something you need to see an emergency vet for as long as it’s not seeming painful and he’s eating and acting normally. Other possible causes would be some type of tumor (though less likely with his age), or a fluid accumulation called a seroma. Your vet may Do a fine needle aspirate (poke the bump with a needle and then look at cells under the microscope) to see what it is and then know how best to treat it. Thank you for asking Petco Pet Education Center, formerly Petcoach!