Lymphatic System

The lymphatic system filters fluid from around cells. It is an important part of the immune system. When people refer to swollen glands in the neck, they are usually referring to swollen lymph nodes. Common areas where lymph nodes can be easily felt, especially if they are enlarged, are: the groin, armpits (axilla), above the clavicle (supraclavicular), in the neck (cervical), and the back of the head just above hairline (occipital).

Lymphoma, Malignant - CT Scan

This abdominal CT scan shows tumor masses (malignant lymphomas) in the area behind the peritoneal cavity (retroperitoneal space).

Hodgkin's Disease, Liver Involvement

Hodgkin's disease (lymphoma) is a malignant cancer that can affect many organs. A whitish, irregular tumor mass of lymphoma cells is seen on the left side of this cross-section of the liver.

Immune System Structures

The immune system protects the body from potentially harmful substances. The inflammatory response (inflammation) is part of innate immunity. It occurs when tissues are injured by bacteria, trauma, toxins, heat or any other cause.