Why does my senior dog have an oozing, scabbing red shoulder bump?

Question

My 10 year old black lab has a large red bump on his shoulder that ozes then scabs up and continues this cycle. He has had ongoing allergic reactions to something unknown with ear and skin issues but now he is developing this mass. Pet's info: Dog | Labrador Retriever | Male | neutered | 10 years and 2 months old | 70 lbs

Lauren Barry, BVSc, MRCVS, DVM · Accepted Answer

Poor Boss, that's a nasty looking lesion. Without seeing it in personI couldn't say for sure what might be the cause. Hopefully it is a type of benign skin cyst, but I am concerned it may be a type of skin tumor. Your vet will be able to examine him and if they can't be certain to what it is they may suggest a non invasive needle biopsy / aspirate, this can tell them what type of cells they are and if there is cancer.

Why does my senior dog have an oozing, scabbing red shoulder bump?

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