My unspayed dog has hard blue lumps near her nipple. Is it serious?
Updated On September 23rd, 2025
My unspayed dog has developed three little blue hard lumps next to her nipple . They don’t seem to bother her.
4 Answers
Most Helpful Answer
Published on March 13th, 2019
She may have mammary cancer which is fairly common in unspayed dogs. Your vet can perform either a biopsy or a fine needle aspirate and cytology to confirm the nature of the mass. If it comes back as mammary cancer, full screening pre-operative bloodwork as well as chest radiographs to rule out metastasis to the lungs will likely be discussed. If chest rads show that cancer has already spread to her lungs, unfortunately surgical removal under anesthesia may not be practical. Good luck-
2Pet Parents found this answer helpful
Related Answers from Veterinarians
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Published on November 8th, 2021
That looks like a tumor that needs to be seen by your vet, especially since it is so close to the nipples/mammary gland, and is irregular in shape and irritated. I would have Ginger seen by your vet and a sample of the tumor taken (or it removed completely and sent to a lab) to determine the cell type and any additional care needed.
1Pet Parents found this answer helpful
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Published on November 6th, 2017
Thanks for using Petco Pet Education Center, formerly Petcoach! I am afraid that while this could be an extra unilateral nipple, it actually is most likely a cutaneous mass. This could be a benign or malignant growth. This is often differentiated by a test called a fine needle aspirate (FNA) which is a pain free, inexpensive and easy procedure which in most cases will help reach a diagnosis. Sometimes a biopsy is needed for a definitive diagnosis. I am really hoping for something benign. Good luck and have a good day!
1Pet Parents found this answer helpful
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Published on January 10th, 2018
This looks like a mammary gland tumor, quite advanced as well, you will need to take her to your vet ASAP, your vet will need to do a chest xray to make sure the tumor has not advanced to the lungs already, if the xray is clear your vet will recommend a surgery to have the tumor removed.
2Pet Parents found this answer helpful
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