Carla presents to her physician with a complaint of swollen axillary lymph nodes. Her physician performs a breast exam and finds a tumor on the same side as the swollen nodes.
a. Explain what process has likely caused her nodes to swell.

The lymphatic system is a network of vessels and nodes that plays a crucial role in immune function and fluid balance. It helps transport lymph, a fluid containing infection-fighting white blood cells, throughout the body. When there is an infection or malignancy, lymph nodes can become swollen as they filter out pathogens or cancer cells, indicating an active immune response.

Metastasis refers to the spread of cancer cells from the original tumor to other parts of the body. In this case, the tumor in Carla's breast may have sent cancerous cells to the axillary lymph nodes, causing them to swell. This process is a critical concern in cancer diagnosis and treatment, as it can indicate the stage and aggressiveness of the disease.

The inflammatory response is the body's immediate reaction to injury or infection, characterized by redness, heat, swelling, and pain. In the context of swollen lymph nodes, this response can occur due to the presence of cancer cells or infection, leading to an accumulation of immune cells in the lymph nodes. This process is essential for understanding how the body reacts to potential threats and the implications for health.