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CLL has also been reported to convert into other more aggressive diseases such as lymphoblastic lymphoma, hairy cell leukemia, high grade T cell lymphomas, [24] acute myeloid leukemia, [25] lung cancer, brain cancer, melanoma of the eye or skin, [26] [27] salivary gland tumors, and Kaposi's sarcomas. [28]
Apoptosis is one of the major mechanisms of cell death targeted by cancer therapies. Reduced susceptibility to apoptosis increases the resistance of cancer cells to radiation and cytotoxic agents. B-cell lymphoma-2 (Bcl-2) family members create a balance between pro and anti-apoptotic proteins. Pro-apoptotic proteins include Bax and Bak.
T-cell prolymphocytic leukemia (T-PLL) is a very rare and aggressive leukemia affecting adults; somewhat more men than women are diagnosed with this disease. [24] Despite its overall rarity, it is the most common type of mature T cell leukemia; [25] nearly all other leukemias involve B cells. It is difficult to treat, and the median survival is ...
The tumor cells in Burkitt lymphoma generally strongly express markers of B cell differentiation (CD20, CD22, CD19), as well as CD10 and BCL6. The tumor cells are generally negative for BCL2 and TdT. The high mitotic activity of Burkitt lymphoma is confirmed by nearly 100% of the cells staining positive for Ki67. [23]
Cancer can be seen as a disturbance in the homeostatic balance between cell growth and cell death. Over-expression of anti-apoptotic genes, and under-expression of pro-apoptotic genes, can result in the lack of cell death that is characteristic of cancer. An example can be seen in lymphomas. The over-expression of the anti-apoptotic Bcl-2 ...
CT scan of primary B cell lymphoma in the left ilium, as diffuse cortical and trabecular thickening of the hemipelvis, mimicking Paget's disease. [2] There are numerous kinds of lymphomas involving B cells. The most commonly used classification system is the WHO classification, a convergence of more than one, older classification systems.
The adjacent micrograph shows a typical RS cell, surrounded by normal lymphocytes. RS cells are distinctively large and have multiple nuclei, as in his case, or one nucleus with two lobes. RS cells express CD30 cell surface protein (a member of the tumor necrosis factor receptor family) and CD15 (a blood group antigen carbohydrate on the cell ...
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 ]