Includes lymphosarcoma, reticulum cell sarcoma, and Burkitt’s lymphoma

Prognosis for aggressively treated localized disease: nearly 90% survival; for advanced disease, survival greater than 60%

Also known as malignant lymphoma

Although similar to Hodgkin’s disease, Reed-Sternberg cells aren’t present, and lymph node destruction is different.

Lymphoid tissue is defined by the pattern of infiltration as diffuse or nodular; nodular lymphomas yield a better prognosis than the diffuse form, but prognosis (for both forms) is less hopeful than in Hodgkin’s disease.

Unknown, although some theories suggesting a viral source for some cases

Varied symptoms depending on the organ involved

Enlarged lymph nodes, most commonly in the lower cervical region, including tonsils and adenoids