What is the expected condition of the submandibular lymph nodes?

The submandibular lymph nodes are expected to be variable in size and smooth in shape under normal circumstances. Lymph nodes serve as an integral part of the immune system, acting as filters for foreign substances and a site for immune cell activation. In healthy dogs, these lymph nodes may change in size due to physiological factors such as age, breed, or recent exposure to pathogens; some may be more prominent than others but still maintain a smooth contour.

While it is important to note that lymph nodes can become enlarged in response to infections or other diseases, this does not mean they are always in that state. Their smooth shape indicates a normal structure, as any roughness or irregularities in their shape could suggest pathology, such as inflammation or neoplastic processes.

In summary, the variability in size among these lymph nodes is a normal finding, as is their smooth surface when they are not reacting to a pathological process. This understanding is crucial in veterinary practice for assessing the health of a canine patient effectively.