Pathology and Pathogenesis of T-Cell Lymphoma.

Peripheral T cell lymphomas (PTCLs) are a heterogeneous and often clinically aggressive group of neoplasms derived from mature post-thymic T lymphocytes. These neoplasms are rare and usually diagnostically challenging. Our understanding of the pathogenesis of PTCL is increasing and this improved knowledge is leading us to better molecular characterization, more objective diagnostic criteria, more effective risk assessment, and potentially to better treatments for these neoplasms.