WHO Classification of Tumours of the Breast is the fourth volume of the 4th Edition of the WHO series on histological and genetic typing of human tumours. This authoritative, concise reference book 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 include new ICD-O codes, epidemiology, clinical features, macroscopy, pathology, genetics, and prognosis and predictive factors. The book, prepared by 90 authors from 24 countries, contains more than 340 colour photographs, tables and figures, and more than 1600 references. Note: Tumours of the Breast does not include female genital organs. Female genital organs will be revised at a later stage around 2014.