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Mantle cell lymphoma: The monoclonal B-cells in this aggressive lymphoma are CD5+ in most cases, CD10−, CD23−, CD43+, CD103−, complete Ig+, and express cyclin D1; these cells have translocations between chromosomes 11 and 14 in >95% of cases and in many cases overexpress the SOX11 transcription factor gene. [2]
MCL is a subtype of B-cell lymphoma, due to CD5 positive antigen-naive pregerminal center B-cell within the mantle zone that surrounds normal germinal center follicles. MCL cells generally over-express cyclin D1 due to the t(11:14) translocation , [ 6 ] a chromosomal translocation in the DNA .
Once set, light chain class remains fixed for the life of the B lymphocyte. In a healthy individual, the total kappa-to-lambda ratio is roughly 2:1 in serum (measuring intact whole antibodies) or 1:1.5 if measuring free light chains, with a highly divergent ratio indicative of neoplasm. The free light chain ratio ranges from 0.26 to 1.65. [1]
The B-cell lymphomas are types of lymphoma affecting B cells. Lymphomas are "blood cancers" in the lymph nodes . They develop more frequently in older adults and in immunocompromised individuals.
CD5 is a good immunohistochemical marker for T-cells, although not as sensitive as CD3. About 76% of T-cell neoplasms are reported to express CD5, and it is also found in chronic lymphocytic leukemia and mantle cell lymphoma (both being B cell malignancies), that do not express CD3.
Primary cutaneous diffuse large B-cell lymphoma, leg type is an aggressive B-cell lymphoma that is often resistant to therapy and carries a poor prognosis, [5] i.e., they have a 5-year disease-specific survival rate of 43% or 70% depending on whether their cancer cells have or do not have, respectively, inactivating mutations in both of their ...
Splenic marginal zone lymphoma (SMZL) is a type of marginal zone lymphoma, a cancer made up of B-cells that replace the normal architecture of the white pulp of the spleen. The neoplastic cells are both small lymphocytes and larger, transformed lymphoblasts , and they invade the mantle zone of splenic follicles and erode the marginal zone ...
It is to be distinguished from two other primary cutaneous lymphomas that involve B-cells, primary cutaneous follicle center lymphoma (PCFCL) and primary cutaneous marginal zone lymphoma (PCMZL), [8] as well as from a B-cell lymphoma that at diagnosis may appear to be limited to the skin but often is a systemic disease affecting numerous organs ...