Lymphomas are malignant proliferations of the lymphoid tissue, mainly of the lymph node; rarely, they can be extranodal (thymus, spleen, and mucosal associated lymphoid tissue - MALT lymphomas).
There are two major types of lymphomas :
- Hodgkin's lymphoma
- Non-Hodgkin's lymphoma
Leukemias are malignant proliferations of the hematopoietic stem cells in the bone marrow.