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T-cell acute lymphoblastic leukemia (T-ALL) is a type of acute lymphoblastic leukemia characterized by an aggressive malignant neoplasm of the bone marrow. [6] Acute lymphoblastic leukemia (ALL) is a condition, wherein immature white blood cells accumulate in the bone marrow and crowd out normal white blood cells. [ 7 ]
Adult T-cell leukemia/lymphoma (ATL or ATLL) is a rare cancer of the immune system's T-cells [1] [2] [3] caused by human T cell leukemia/lymphotropic virus type 1 . [4] All ATL cells contain integrated HTLV-1 provirus further supporting that causal role of the virus in the cause of the neoplasm. [ 4 ]
T-cell leukemia describes several different types of lymphoid leukemia which affect T cells. Types include: [1] Large granular lymphocytic leukemia; Adult T-cell leukemia/lymphoma; T-cell prolymphocytic leukemia; In practice, it can be hard to distinguish T-cell leukemia from T-cell lymphoma, and they are often grouped together.
T-cell-prolymphocytic leukemia (T-PLL) is a mature T-cell leukemia with aggressive behavior and predilection for blood, bone marrow, lymph nodes, liver, spleen, and skin involvement. [1] T-PLL is a very rare leukemia, primarily affecting adults over the age of 30. It represents 2% of all small lymphocytic leukemias in adults. [2]
In acute lymphoblastic leukemia, lymphoid cell development stops at the lymphoblast (arrow), which are also overproduced. The cancerous cell in ALL is the lymphoblast. Normal lymphoblasts develop into mature, infection-fighting B-cells or T-cells, also called lymphocytes. Signals in the body control the number of lymphocytes so neither too few ...
As the name suggests, T-cell large granular lymphocyte leukemia is characterized by involvement of cytotoxic-T cells). [ 2 ] In a study based in the US, the average age of diagnosis was 66.5 years [ 3 ] whereas in a French study the median age at diagnosis was 59 years (with an age range of 12–87 years old). [ 4 ]