Lymphoblasts are early types of white blood cell that the B and T lymphocytes develop from. Lymphoblastic lymphoma is a type of non-Hodgkin's lymphoma that involves the lymphoblasts. It is a high grade lymphoma. There is also a type of leukaemia called acute lymphoblastic (or lymphocytic) leukaemia (ALL). Found on https://www.encyclo.co.uk/local/20753