gastrointestinal (GI), and mediastinal (involving the chest). Mast cell tumors are the most common skin tumors in dogs. They arise from mast cells, which are involved in allergic responses and inflammation. This type of cancer can vary greatly in appearance, from small lumps to aggressive forms that invade surrounding tissues. Signs can include itchy skin, swelling, and redness. Osteosarcoma is a highly aggressive bone cancer that primarily affects large dog breeds, such as Great Danes and Rottweilers. The cancer usually manifests as a painful swelling in the limbs, leading to lameness and reluctance to exercise. Hemangiosarcoma is a malignant tumor of the blood vessels that most often affects the spleen, heart, and skin. This aggressive type of cancer in pets often goes undetected until signs such as sudden weakness, collapse, or abdominal swelling from internal bleeding become severe. Oral cancers, such as squamous cell carcinoma and melanoma, are increasingly recognized in pets, especially older dogs and cats. Signs may include bad breath, difficulty eating, excessive drooling, and visible lumps in the mouth. Mammary cancer is more commonly diagnosed in female dogs and cats, particularly those that have not been spayed or were spayed later in life. Signs include lumps, swelling, or discharge in the mammary region. Early spaying significantly reduces mammary cancer risk. Transitional cell carcinoma (TCC) is a malignant tumor that affects the urinary bladder. It is most commonly diagnosed in older dogs, particularly certain breeds such as Scottish Terriers and West Highland White Terriers. Signs include frequent urination, blood in the urine, straining to urinate, and urinary incontinence. Regular veterinary checkups, combined with close observation of your pet’s behavior and any physical changes, can help you spot potential cancer signs early and seek treatment before it is too late. SPONSORED BY Cancer in Pets: What Every Pet Owner Should Know AS A PET PARENT, THINKING about your pet facing cancer is distressing. Unfortunately, cancer is a common diagnosis in pets, especially as they age. However, understanding the different types of cancer that affect your pets can empower you to recognize warning signs and seek timely veterinary care. Lymphoma is one of the most common types of cancer in dogs and cats. It originates in the lymphatic system, which is responsible for immune function. This cancer occurs when lymphocytes, which are a type of white blood cell, grow out of control. Signs may include swollen lymph nodes, weight loss, lethargy, and vomiting. There are multiple forms of lymphoma, including multicentric (affecting multiple lymph nodes), 54 JULY 2026 | INTHEVUE.COM
