Why is a new growth forming on my older spayed dog's mammary lump?

Question

What causes a teat to grow from a mammary tumor that's belign. My dog is spayed .. 11 years old . And has secondary bacterial skin infection and skin allergies .. Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Female | spayed | 11 years and 4 months old | 55 lbs

Dr. Massimo Orioles, DVM, Cert AVP, MRCVS · Accepted Answer

That could be due to a mastitis (infection of the mammary gland) or possibly the tumor could have turned not benign anymore. 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). The biopsy usually give definitive/reliable results. Chest x rays may be needed as well in case of a tumoral growth. Hope this answer was helpful, but 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.

Why is a new growth forming on my older spayed dog's mammary lump?

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