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B2M.md
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| 1 | -# [B2M] |
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| 2 | +The B2M (β2-microglobulin) gene plays a crucial role in the function of the major histocompatibility complex (MHC) class I molecules, which are essential for immune system recognition of infected or malignant cells. B2M mutations in B-cell lymphomas, particularly in DLBCL and PMBCL, lead to reduced MHC class I expression, enabling tumor cells to evade immune detection and destruction by cytotoxic T cells. |
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| 3 | 4 | ## Mutation tier |
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