Nearly one in four dogs will develop cancer at some point in their life. The most common type is lymphoma, which so often mimics other diseases that it’s been called “the great pretender.”
Canine lymphoma most often starts in a dog’s lymph nodes, resulting in large, firm lumps most easily seen under the jaw or behind the knees. But other forms of lymphoma are common, too. Gastrointestinal lymphoma usually causes vomiting, diarrhea and weight loss, while lymphoma in the chest typically results in abnormal breathing. Signs of cutaneous lymphoma can range widely, from dry itchy skin to open sores — even lesions in a dog’s mouth.
Because lymphoma can involve any organ, it can cause a variety of signs and symptoms. That’s why it’s important to have your dog’s problems addressed early so your veterinarian can track down a diagnosis.