KMT2D.md
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# KMT2D
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+## Overview
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+KMT2D (also known as MLL2) encodes a histone H3K4 methyltransferase, playing a crucial role in germinal center B cell development and function. Mutations in KMT2D are among the most common mutations in FL and are also common in DLBCL.<sup>1</sup> KMT2D mutations are recurrent but less common in BL and MCL and many other B-cell neoplasms. Mutations typically cause loss of KMT2D function, leading to diminished H3K4 methylation, impacting gene expression that favours lymphomagenesis.
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## Relevance tier by entity
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