Abstract: The 2008World Health Organization Classification of Tumors of Hematopoietic and Lymphoid Tissues (4th edition) has greatly advanced the diagnosis, treatment, academic exchange, and research of lymphoma worldwide. A new revised edition will be published soon, in which the diagnosis and management of lesions at the very early stages of lymphomagenesis, the diagnostic criteria for several entities, and the genetic/molecular landscape of numerous lymphoid neoplasms and their clinical correlates have been clarified, refined, detailed, and expanded. Furthermore, several new concepts have been suggested in the upcoming revised edition, although the framework of classification remains the same. These updates will lead to development of more targeted therapeutic strategies and increase our confidence in the era of precision medicine. This manuscript will review the major advances and updates that are helpful for our un -derstanding and improvement in tumor diagnosis.