Canine mast cell tumors (MCTs) are among the most commonly diagnosed skin tumors in dogs, often presenting a complex challenge for pet owners and veterinarians alike. These tumors arise from mast cells, a type of white blood cell responsible for mediating allergic reactions and inflammation. While they can vary significantly in appearance, understanding their characteristics is crucial for early detection and treatment. Mast cell tumors can manifest in various forms, ranging from benign to malignant, making it essential to recognize the signs and symptoms associated with them. The diagnosis and treatment of mast cell tumors depend heavily on their appearance, location, and grade. Owners may encounter these tumors in various…