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Ask the Veterinarian/Cat swollen upper lip

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Question
Q;My rescue domestic short hair male has had a recurring swollen lip for the past year. He has been getting Convena injection every six weeks, now he is swollen after 9 days. I have switched to Hypoallergenic Hydrolyzed food, yesterdays news litter, stainless steel feeding dishes, and all plastic eliminated. He is only 2 years old, they  want to do a biopsy . What can this be?

Answer
This sounds like something called a "rodent ulcer."  It is how many cats show allergies.  It is part of something called the eosinophilic granuloma complex.  It is usually treated with either a shot of a long acting steroid or a new oral medication called Atopica.

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Dr. Louis N. Gotthelf

Expertise

Dermatology and ear diseases of dogs and cats

Experience

I am the author of "Small Animal Ear Diseases; An Illustrated Guide" published by W.B. Saunders. I have over 25 years of clinical experience with a special interest in dermatologic conditions and ear diseases.

Organizations
American Academy of Veterinary Dermatology

Publications
Veterinary Forum
Veterinary Medicine
Waltham Focus

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