Cutaneous mast cell tumor vs skin tag?

Thanks for your question! Distinguishing between a cutaneous mast cell tumor and a skin tag can be tricky. A mast cell tumor is a type of skin cancer common in dogs, often appearing as a lump or bump that can vary in size. Skin tags, on the other hand, are benign growths that are usually small and flesh-colored.



Here are some differences to consider: Mast cell tumors may change in size, become red or irritated, and can sometimes release histamine, causing itching or inflammation. Skin tags are generally consistent in appearance and painless.



At home, you can keep an eye on the growth for changes in size, color, or texture. Gently feel the area without squeezing or manipulating it too much, as this could irritate a mast cell tumor and cause it to release histamine.



Watch for signs such as rapid growth, ulceration, or if your pet is in discomfort—that would suggest a need for prompt veterinary attention. If the lump is growing quickly, is painful, or starts to change, it’s important to address this with a vet.



I recommend booking a video consult with us at Dial A Vet to get a personalized assessment and guidance on whether a vet visit is needed for further examination or treatment.