Biopsy results

Well, it's very good news! The vet just called and said that the biopsy results came back. She said that it's benign, so that's great! She also said what Mia had is not even technically qualified as a tumor.... It's called a Follicular Hamartoma.

She said that it's basically caused by a build-up of hair and then I guess it enters the pores and blocks them and then caused that mass... (I know, my explanation isn't very scientific!)

Here's a more scientific definition from the FetchDog site:
"A "hamartoma" is defined as a nodular, poorly circumscribed focus of redundant tissue. The ones considered here are formed from fibrous tissue (collagen). Some include hair follicles and glandular structures. They may then be called fibroadnexal hamartoma ("fibroadnexal dysplasia" or "focal adnexal hyperplasia"). Follicular hamartoma (hair follicle nevus) is a subcategory."

...

"Follicular hamartoma is said to be a congenital abnormality of the follicles but is often not clinically apparent until later in life. They are uncommon in dogs and frequently multiple. The nodules or plaques have thick hairs. The number of nodules may increase and they may expand up to 2 inches in diameter. They are not of clinical significance although they may look worrying."

...

"Can this tumor disappear without treatment?
These masses may reduce in size as the fibrous tissue matures, inflammation reduces or infection is eliminated. However, most remain as solid tissue masses and will not disappear entirely without surgical removal."

I'm so happy and relieved! Now we just have to make sure she keeps the cone on until we get the stitches removed on December 23rd. As soon as we remove it she tries to scratch!