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My dog has a lump near her tail. What is an apocrine gland tumor?

Updated On September 23rd, 2025

Pet's info: Dog | Labrador Retriever | Female | spayed | 5 years and 7 months old | 92 lbs

My 5 year old female lab has a lump below the tail and above the anus. She is prone to fatty tumors, but the vet said this may be on a gland. The gland he mentioned i can not gind any info about online. I heard something like "amprican" gland. I asked the vet assistant is she could verify and she called back with the same name. She is scheduled for surgery on Thursday and i wanted to do a bit more research if possible. Any ideas?

1 Answer

Most Helpful Answer

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Answered By Dr. B. DVM, DACVIM (Oncology)

Veterinarian

Published on September 1st, 2018

If the lump is associated with one of the anal sacs (glands at about 4 and 8 o clock inside the anal sphincter) it could be an apocrine gland tumor. Apocrine glands are sweat glands. There are also other lumps that can occur in this area so it depends on if the lump is in the typical location for one of these glands. One thing that could be considered before surgery is a needle aspirate with cytology. We use this test commonly to try to diagnose lumps before surgery. It can be helpful to know what it is before surgery because if malignant some tests may be recommended before surgery and the surgery plan sometimes changes. I hope this helps and thank you for using Petco Pet Education Center, formerly Petcoach!

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