Mast Cell Tumour?
by Tony Bracher
(Derby, UK)
The red, inflamed lump on the Boxer's back
Thank you for writing, Tony. Boxers are one of the breeds most likely to develop mast cell tumors, and lumps that come and go, ulcerate, or become red and inflamed are typical of them. Several other skin problems, including infected cysts and skin infections, can look the same, though. So the most important next step is to have your vet take a quick needle sample (fine-needle aspirate) from the inflamed lump and, ideally, the others. It's simple, usually done during a normal appointment, and normally tells you right away whether it's a mast cell tumor.
In the meantime, avoid squeezing or repeatedly cleaning the lump. Handling a mast cell tumor can make it release histamine, which makes it swell and redden. Keep your dog from licking it. And tell your vet if you notice vomiting, poor appetite or dark stools.
If it is a mast cell tumor, the outlook depends mainly on its grade. Many tumors in young Boxers are low grade and cured by surgery. Our updated guide to mast cell tumors in dogs explains what to expect.
This is general information, not a diagnosis. Please follow your own vet's advice.
