WHO Classification of Tumours of Haematopoietic and Lymphoid Tissuesis a Revised Fourth Edition of the WHO series on histological and genetic typing of human tumours. This authoritative, concise reference provides an international standard for oncologists and pathologists and will serve as an indispensable guide for use in the design of studies monitoring response to therapy and clinical outcome. Diagnostic criteria, pathological features, and associated genetic alterations are described in a strictly disease-oriented manner. Sections on all recognized neoplasms and their variants further include new ICD-O codes, epidemiology, clinical features, macroscopy, prognosis, and predictive factors. This classification, prepared by 132 authors from 23 countries, contains about 1300 color images and tables and more than 4500 references.