There are a few other potential causes of swollen lymph nodes in dogs that are not associated with an infection or cancer. Other causes of swollen lymph nodes in dogs Metastatic cancers, or cancers that have spread from another area of the body, can also cause swollen lymph nodes. In some cases, dogs with lymphoma may also have weight loss, appetite changes, and fever. Lymphoma is a type of cancer that originates in the cells of the lymphatic system and can spread to other parts of the body.ĭogs with lymphoma may have enlarged lymph nodes that are not associated with any other symptoms. Lymphoma is the most common cancer that affects lymph nodes in dogs and it can be difficult to tell apart from other infections without running some diagnostic tests. Cancerous causes of swollen lymph nodes in dogs The affected lymph nodes are often near the site of the infection. In severe cases, dermatological infections, such as pyoderma can result in swollen lymph nodes in dogs. Many dogs who have one of these infections will also have other symptoms such as fever, lethargy, or diarrhea. There are several possible infectious causes of enlarged lymph nodes, including but not limited to: bacterial, tick-borne, fungal, and parasitic. Infections may be within the lymph node itself or be a reactive lymph node (reactive lymphadenopathy) from a distant source. One of the most common causes of swollen lymph nodes in dogs is due to an infection within the body. Infectious causes of swollen lymph nodes in dogs There are several potential causes of swollen lymph nodes in dogs and in most cases, enlarged or swollen lymph nodes are a result of an infectious or cancerous process. These are the lymph nodes located beneath the jaw and are often the most recognizable because their location makes them easy to see and feel. The most commonly identified swollen lymph nodes in dogs by dog owners are the submandibular lymph nodes. In other cases, your dog may have swollen lymph nodes that cannot be seen or felt as they are not involving the peripheral lymph nodes as discussed above. In some cases, the nodes may be so large that they are visible on the surface of the skin.
Swollen lymph nodes can vary in size, but they are typically larger than normal and may feel firm or rubbery to the touch. What do swollen lymph nodes look like on dogs? The peripheral lymph nodes are submandibular (beneath the jaw area), prescapular (lower neck, near the chest), axillary (armpit), inguinal/femoral (inner thigh), and popliteal (behind the knees). When it comes to the physical examination, your veterinarian will evaluate and palpable all the peripheral lymph nodes. Lymph nodes are located throughout the lymphatic system, including in the neck, chest, abdomen, and legs. The lymphatic system is a network of tubes and vessels that help rid the body of toxins, waste, and other unwanted material. Lymph nodes are glands of the lymphatic system.
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