Non-Hodgkin lymphoma
Non-Hodgkin's lymphoma is a disease in which cancer cells form in a person's lymphatic system and start to grow uncontrollably. There are several different types of lymphomas. Some lymphomas involve a particular type of cell; these are grouped under the heading Hodgkin's disease. All other forms of lymphoma fall into the non-Hodgkin's grouping. The different forms of non-Hodgkin's lymphoma depend on such things as what the cells look like under a microscope.
Alternative names: Lymphoma - non-Hodgkin's; Lymphocytic lymphoma; Histiocytic lymphoma; Lymphoblastic lymphoma; Cancer - non-Hodgkin's lymphoma
source: kidshealth