<unk>  (American English) or<unk>  of the<unk>  and<unk><unk>  (British English) are<unk>  that affect the blood, bone marrow, lymph, and lymphatic system. Because these<unk>  are all intimately connected through both the circulatory system and the immune system, a disease affecting one will often affect the others as well, making myeloproliferation and lymphoproliferation (and thus the leukemias and the lymphomas) closely related and often overlapping problems. While uncommon in solid<unk> , chromosomal translocations are a common cause of these diseases. This commonly leads to a different approach in diagnosis and treatment of hematological malignancies. Hematological malignancies are malignant neoplasms ("cancer"), and they are generally treated by specialists in hematology and/or oncology. In some centers "hematology/oncology" is a single subspecialty of internal medicine while in others they are considered separate divisions (there are also surgical and radiation oncologists). Not all hematological disorders are malignant ("cancerous"); these other blood conditions may also be managed by a hematologist. Hematological malignancies may derive from either of the two major blood cell lineages: myeloid and<unk>  cell lines. The myeloid cell line normally produces granulocytes, erythrocytes, thrombocytes, macrophages and mast cells; the<unk>  cell line produces B, T, NK and plasma cells. Lymphomas, lymphocytic leukemias, and myeloma are from the<unk>  line, while acute and chronic myelogenous leukemia, myelodysplastic syndromes and myeloproliferative diseases are myeloid in origin. A subgroup of them are more severe and are known as haematological malignancies (British English)/hematological malignancies (American English) or blood cancer. They may also be referred to as liquid<unk> .
Tumors of the hematopoietic and lymphoid tissues
Oral manifestations of systemic disease
Lymphoproliferative disorders
Multisystem inflammatory syndrome in children
Effects of flooding on skin
Overwhelming post-splenectomy infection
Immune tolerance in pregnancy
Immune-mediated inflammatory diseases