Mondo Description Neoplasms of the hematopoietic system, including hematopoietic cell neoplasms (e.g. leukemias, lymphomas) and non-hematopoietic cell neoplasms that can affect the hematopoietic system (e.g. lymph node and splenic sarcomas). --2003

Disease Ontology Description An organ system cancer located in the hematological system that is characterized by uncontrolled cellular proliferation in blood, bone marrow and lymph nodes.