My dog has a large, rapidly growing lump on his back. Is it a tumor?

This could be a seroma from an injury, a cyst, abscess or a tumor. Cysts and abscesses need to be drained by a vet. If your vet suspects a tumor, he will do a fine needle aspirate to determine whether it is a harmless lipoma, which does not need to be removed unless it is ulcerating or bothers the dog due to its location or size, or another tumor that needs to be removed. Please make an appointment with your veterinarian for an exam of the mass.

Without further testing, there is no way to tell if this growth is a malignant (cancerous) type that can spread elsewhere and/ or invade the healthy tissue around them, or a more benign (noncancerous) type that is unlikely to spread. In some cases abscesses can form due to infection, or bumps can form due to trauma/pressure on the area or due to allergies, but in this case the picture appears to be a raised mass of some sort. I recommend making an appointment to see your vet to have the growth tested. In many cases this can be done using a fine needle aspirate, where cells are removed from the growth using a needle and examined under a microscope to determine what it is and to guide treatment. In some cases further testing may be needed to determine the necessary course of treatment, but it is important to get new growths tested in a timely manner, as some can be cancerous and quite aggressive in their growth, and growths due to infection, allergy or trauma can lead to complications or be indicators of underlying health problems. In the meantime, if Rudy begins licking the area, make sure he wears a “cone” (also known as an e-collar or Elizabethan collar) at all times when he is not being directly supervised by you, including while sleeping to help prevent infection.

Yes, it is a tumour. I would have it rechecked and have it sampled to see what kind of tumour it is. All skin lumps are tumours, but some are completely harmless, some can spread locally, others can spread to different parts of the body. A small test, such as a fine needle aspirate, might give you more of an idea. Good luck !

Thanks for visiting Petco Pet Education Center, formerly Petcoach! This appears to be a skin mass/tumor and can be either benign (non-cancerous) or malignant (cancerous). My hunch tells me it is likely a sebaceous gland cyst (benign tumor); however, it is always best to get masses tested through your vet to be sure. Masses like this are often removed during another surgical procedure, such as a teeth cleaning. Removal should be considered in case this thing ruptures or causes irritation to Sydney in the near future. I hope things work out well for your pet Sydney. Take care.

Without a physical exam or diagnostics, it is difficult to determine if this is something to worry over. Ideally, a fine needle aspirate or biopsy should be done to collect samples for pathology. This may provide a diagnosis. X-rays of the limb may be recommended to rule out bony involvement. Since you state it is growing, it should be removed before it becomes too large. As it is, that is a difficult area to close after a mass removal.

Yes, typically lumps can be removed. Given that it has gotten bigger on Casino, it would be best to have the lump diagnosed and removed. It could be a cyst, a benign tumor, or a malignant tumor. I would take Casino into he vet tomorrow if possible.

Awww, he's a handsome guy! Tumors which appear as lumps and bumps on the skin or can be felt or seen but are just under the skin are common with age; some are benign and not problematic, while some can be life threatening. Lipomas are common, which are usually relatively soft, freely movable under the skin (you can push it around) and are non painful. Generally these are slow growing, they do not cause cancer elsewhere in the body (though its very common for a dog to have multiple lipoma tumors) and rarely cause a problem. Mast cell tumors, on the other hand, can be aggressive and can cause systemic illness. They can look like lipomas; the only way to know the difference is for your vet to perform a fine needle aspirate (where they will poke the bumps with a needle to get a sample of the cells and then look at them under a microscope. Other skin tumors can include squamous cell carcinomas which can be very locally invasive and aggressive, and grow quickly. Keep an eye on the lumps and bumps. If any of them are quickly growing, start to break open or bleed, or any of them are painful when touched, he should be seen by a vet. A golfball sized tumor is immensely easier to remove than a football sized one--so addressing a lump when its small is much better Grady and also will cost less than waiting until its very large. I hope that helps you, thank you for asking Petco Pet Education Center, formerly Petcoach!