What+is+the+difference+between+lymphoma+and+leukemia?

What is the difference between a lymphoma and a leukemia? Lymphomas are closely related to [|lymphoid][|leukemias], which also originate in lymphocytes but typically involve only circulating blood and the [|bone marrow] (where blood cells are generated in a process termed [|haematopoesis]) and do not usually form static tumors. http://en.wikipedia.org/wiki/Lymphoma