MedGen

A cancer of the blood and bone marrow characterized by an abnormal proliferation of leukocytes. [from HPO]

Acute lymphoblastic leukemia (ALL), also known as acute lymphocytic leukemia, is a subtype of acute leukemia, a cancer of the white blood cells. Somatically acquired mutations in several genes have been identified in ALL lymphoblasts, cells in the early stages of differentiation. Germline variation in certain genes may also predispose to susceptibility to ALL (Trevino et al., 2009). Genetic Heterogeneity of Acute Lymphoblastic Leukemia A susceptibility locus for acute lymphoblastic leukemia (ALL1) has been mapped to chromosome 10q21. See also ALL2 (613067), which has been mapped to chromosome 7p12.2; and ALL3 (615545), which is caused by mutation in the PAX5 gene (167414) on chromosome 9p. [from OMIM]

A neoplasm characterized by abnormalities of the lymphoid cell precursors leading to excessive lymphoblasts in the marrow and other organs. It is the most common cancer in children and accounts for the vast majority of all childhood leukemias. [from MeSH]

The most frequent type of acute lymphoblastic leukemia. Approximately 75% of cases occur in children under six years of age. This is a good prognosis leukemia. In the pediatric age group the complete remission rate is approximately 95% and the disease free survival rate is 70%. Approximately 80% of children appear to be cured. In the adult age group the complete remission rate is 60-85%. (WHO, 2001) [from NCI]

A rare, acute myeloid leukemia characterized by evidence of granulocytic maturation and more than 20% of blast cells in the bone marrow and/or peripheral blood. The maturing non-blast granulocytic cells account for greater than or equal to 10% and monocytic cells less than or equal to 20% of the bone marrow cells. Various degrees of anemia, thrombocytopenia, or pancytopenia are present. Frequent clinical manifestations include fatigue, fever, bleeding disorders, and organomegaly, especially hepatosplenomegaly. [from ORDO]

A disease or disorder that involves the lymphoid system. [from MONDO]

A clonal expansion of myeloid blasts in the bone marrow, blood or other tissues. The classification of acute myeloid leukemias (AMLs) encompasses four major categories: 1) AML with recurrent genetic abnormalities; 2) AML with multilineage dysplasia; 3) Therapy-related AML; 4) AML not otherwise specified. The required bone marrow or peripheral blood blast percentage for the diagnosis of AML is 20% (WHO classification) [from NCBI]

Form of leukemia characterized by an uncontrolled proliferation of the myeloid lineage and their precursors (myeloid progenitor cells) in the bone marrow and other sites. [from MONDO]

A malignant lymphocytic neoplasm of B-cell or T-cell lineage involving primarily the bone marrow and the peripheral blood. This category includes precursor or acute lymphoblastic leukemias and chronic leukemias. [from HPO]

A leukemia that originates from a myeloid cell, that is the blood forming cells of the bone marrow. [from HPO]

Disorders characterized by abnormal proliferation of primary cells of the immune system or by excessive production of immunoglobulins. [from MONDO]

A disorder characterized by proliferation of lymphocytes at various stages of differentiation. Lymphoproliferative disorders can be neoplastic (clonal, as in lymphomas and leukemias) or reactive (polyclonal, as in infectious mononucleosis). [from NCI]

A neoplastic or non-neoplastic disorder that affects the production and proliferation of the hematopoietic cells including lymphoid cells, the synthesis of hemoglobin, and/or the mechanisms of coagulation. [from NCI]

A neoplasm of immature malignant lymphocytes (lymphoblasts) committed to the B-cell or T-cell lineage. Neoplasms involving the bone marrow and the peripheral blood are called precursor lymphoblastic leukemias or acute lymphoblastic leukemias. Neoplasms involving primarily lymph nodes or extranodal sites are called lymphoblastic lymphomas. [from NCI]

A T-lymphoblastic lymphoma that occurs during childhood. [from NCI]

T lymphoblastic leukemia/lymphoma that occurs during childhood. [from NCI]

A B acute lymphoblastic leukemia that occurs during childhood. [from NCI]