My senior dog has a large bump on her back. Is it a cyst or cancer?

Thank you for providing a picture of Mia's lump! It could be a benign tumor, a cyst, or a malignant tumor. Unfortunately in a senior dog, there is always a chance it could be malignant. Any suspicious lumps should be examined by the vet. The vet can perform a test called 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. I would take her into the vet in the next couple of days to have this lump examined and diagnosed so it can be treated as needed. Good luck, I hope this helps!

I agree that the first picture appears to be a skin tag and the second picture looks like it could be a cyst or perhaps a Sebaceous adenoma. I am not too concerned about these masses, but obviously an examination is far better than an evaluation of a picture. If your veterinarian is concerned they appear small enough that perhaps removal with just a local anesthesia may work. Best of luck and I hope she does well. Thank you for using Pet Coach.

This kind of lump/growth needs to be ideally assessed by your veterinarian to have a definitive and specific answer. Usually there are two ways your vet can do that a part from examining it directly during physical examination. A biopsy can be taken under local or general anesthetic, otherwise a smaller sample through a fine needle can be aspirated (this technique is called FNA= fine needle aspiration). Differentials include skin cysts, infections, benign or more sinister type of tumors. Please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further.

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.

Hello and thank you for your post! Thank you for the pictures as this helps narrow down what this could be. It appears to be a cyst or wart like mass that has developed. If Joyce is an older dog, changes to the skin are typical and we can see warts and cysts develop more frequently with age. If you are concerned about this, then I would take her in to see your vet to see if they can definitively say whether or not it is a cyst or wart. There are simple tests we can do in the hospital setting to get a better idea of what it could be. We can stick a small needle in the mass and look at the contents under a microscope to help better understand what it could be. Hope this helps! Please feel free to contact me with any further questions / concerns you may have!

Hello my name is Dr. Elyse Macartney, and I would like to help answer you questions regarding Brandi's skin lump today. First of all thank you for sending the picture of the lump. From the picture you have sent the lump appears to be a skin growth. There are several types off lumps or masses that can grow in the skin of dogs such as sebaceous cysts, warts, abscesses, lipomas, and several types of cancers. Some of these cancers are benign and some are malignant, so careful observation is important, as well as having a vet examine it if you are concerned. My first step of advice for you would be to use a ruler to measure the lump today. Then repeat that measurement every few weeks. Continue to monitor the lump for growth, ulceration, pain, bleeding, swelling, and changes in texture or color. Rapidly growing and changing masses are more concerning, and may be a sign of malignancy. Because this is a new mass and because you have already observed growth, I would suggest taking Brandi in to have the mass examined by her veterinarian. The veterinarian will most likely want to take a sample of the cells within the mass using a FNA (fine needle aspirate). Using cytological examination of those cells, the type of mass can be identified and a treatment plan created. I hope this information was helpful, and I have included the link to further articles below. https://www.petcoach.co/article/lumps-on-dogs-when-you-should-be-concerned/ https://www.petcoach.co/article/can-pets-get-skin-cancer/

It could be that Lady has a cyst causing this lump. In a senior dog, it could also be a malignant tumor or a benign tumor. Without seeing her in person, I can't say for certain. If your vet sent her to a surgeon, then I would suspect that your vet believes it needs to be removed. I'm sorry you felt this surgeon was only worried about money, so I'd suggest speaking to your vet about a referral to another surgeon to get this lump diagnosed and possibly removed. It sounds like it's quite large if it's grapefruit size, and if it continues to grow, it could affect her ability to walk. In addition, if it is malignant, it needs to be removed as soon as possible. Best of luck, I hope this helps!