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Guinea pig with mammary tumor.

Species: Other
Breed: Guinea pig
Age: 5-8 years
what does a large open lump on a guinea pigs tit mean? the tit has gone!




Online vet, Dr. Marie

Dr. Marie replied:

Sorry to hear that Muffin is having these problems.

Unfortunately mammary gland tumors (cancer) are quite common in older guinea pigs.

A recent study showed that 50% of mammary cancers in guinea pigs are benign and 50% are malignant.

However, if you are seeing that the area has ruptured then I am concerned that this may be a malignant cancer.

An abscess is a possibility, but not as likely.

It's a good idea to have your vet take a look. They may be able to do surgery to remove the lump. Or, they might be able to prescribe some antibiotics which could help for a little while.

Dr. Marie.

---This question was asked in our Ask A Vet For Free section.---


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Disclaimer: Although Dr. Marie is a qualified veterinarian, the information found on this site is not meant to replace the advice of your own veterinarian. AskAVetQuestion.com and Dr. Marie do not accept any responsibility for any loss, damage, injury, death, or disease which may arise from reliance on information contained on this site. Do not use information found on this site for diagnosing or treating your pet. Anything you read here is for information only.

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Dr. MarieDr. Marie is a veterinarian who practices in a busy animal hospital in Ottawa, Ontario. She created Ask A Vet Question as a resource for good, accurate veterinary advice online. Dr. Marie treats dogs, cats, hamsters, guinea pigs, and rats. She has been a vet since 1999.

Is an online vet visit just as good as a trip to your veterinarian? No! But, many times, asking an online veterinarian a question can help save you money. While Dr. Marie can't officially diagnose your pet or prescribe medications, she can often advise you on whether a vet visit is necessary. You can also ask Dr. Marie for a second opinion on your pet's condition.