RecruitingExploring the Clinical Impact of MYC Aberrations and Their Relationship With Microenvironment in Diffuse Large B Cell Lymphoma and High-Grade B Cell LymphomaThis is a observational, retrospective and prospective study designed to assess the potential correlations between MYC alterations, lymphoma mutational landscape and functional immune contextures in Diffuse Large B-cell Lymphoma or High-Grade B-cell Lymphoma