Hodgkin's disease is one of a group of cancers called lymphomas .
Lymphoma is a general term for cancers that develop in the lymphatic system .
Hodgkin's disease, an uncommon lymphoma, accounts for less than 1 percent of all cases of cancer in this country. Other cancers of the lymphatic system are called non-Hodgkin's lymphomas. What You Need To Know About Non-Hodgkin's Lymphoma . The lymphatic system is part of the body's immune system . It helps the body fight disease and infection.