IMMUNOLOGY

Detailed explanation-1: -Lymphomas are cancers that start in certain immune cells called lymphocytes. These cancers most often affect lymph nodes or other lymph tissues, like the tonsils or thymus (a small organ in front of the heart).

Detailed explanation-2: -Hodgkin lymphoma is a cancer of lymph tissue. Lymph tissue is found in the lymph nodes, spleen, liver, bone marrow, and other sites. This abdominal CT scan shows tumor masses (malignant lymphomas) in the area behind the peritoneal cavity (retroperitoneal space).

Detailed explanation-3: -Non-Hodgkin lymphoma can cause lymph nodes to become enlarged. Enlarged lymph nodes close to the surface of the body (such as on the sides of the neck, in the groin or underarm areas, or above the collar bone), may be seen or felt as lumps under the skin. These are usually not painful.

Detailed explanation-4: -Overall, the average age of people when they are diagnosed is 39. Hodgkin lymphoma is rare in children younger than 5 years old. But it’s the most common cancer diagnosed in adolescents ages 15 to 19 years.