The third edition remains connected to the previous editions in being concise, well-illustrated, and conceptual. In the third edition, recent advances have been incorporated wherever required. This edition uses the classification, nomenclature, and diagnostic approach to malignant hematologic diseases as per the recent updated and revised World Health Organization Classification of Tumors of Hematopoietic and Lymphoid Tissues published in 2017. The scope of the book encompasses students of MBBS, postgraduates in pathology and medicine, and students of medical laboratory technology. The third edition presents: A simplified and concise text of blood disorders. Covers commonly encountered hematologic disorders and basics of blood transfusion in a concise manner. Incorporates most recent advances in the field. Described the classification, nomenclature, and diagnostic approach to malignant hematologic diseases as per the recent updated and revised World Health Organization Classification of Tumors of Hematopoietic and Lymphoid Tissues published in 2017. Information boxes included for last minute revision. Numerous illustrations, tables, and algorithms for rapid and ease of understanding. Essential appendices incorporated for quick reference.