What do lymph nodes look like in a cat? - briefly
In cats, lymph nodes are small, bean-shaped structures typically ranging from a few millimeters to a centimeter in size, often felt as firm, movable bumps beneath the skin.
What do lymph nodes look like in a cat? - in detail
Lymph nodes in cats are small, bean-shaped structures that are part of the lymphatic system, which supports immune function and fluid balance. In a healthy cat, lymph nodes are typically smooth, firm, and mobile under the skin. They are usually not visible externally and are only palpable when enlarged due to infection, inflammation, or other conditions. The size of normal lymph nodes varies but generally ranges from a few millimeters to about 1 centimeter in diameter, depending on the specific node and the cat’s size.
Cats have several major lymph node groups, including the submandibular (under the jaw), prescapular (in front of the shoulder blades), axillary (in the armpit), inguinal (in the groin), and popliteal (behind the knees). Each lymph node is encapsulated by connective tissue and contains specialized immune cells, such as lymphocytes and macrophages, which filter harmful substances like bacteria, viruses, and abnormal cells from the lymph fluid.
When a lymph node becomes enlarged or swollen, it may feel more prominent, firmer, or even irregular in shape. This condition, known as lymphadenopathy, can be localized to one node or affect multiple nodes, depending on the underlying cause. In some cases, the overlying skin may appear red or warm to the touch if inflammation or infection is present. Veterinarians often examine lymph nodes during physical exams to assess a cat’s health and identify potential issues.
Microscopically, lymph nodes consist of an outer cortex and an inner medulla. The cortex contains densely packed lymphocytes, while the medulla houses fewer cells and more sinuses that facilitate the flow of lymph. This intricate structure allows lymph nodes to efficiently trap and process foreign particles.
In summary, lymph nodes in cats are small, smooth, and typically not visible or easily felt unless they become enlarged. Their structure and function are essential for maintaining the cat’s immune defense, and any noticeable changes in size, shape, or texture should prompt a veterinary evaluation to determine the underlying cause.