As hematologic diseases become increasingly complex, accurate diagnosis of bone marrow disorders presents a formidable challenge. Integrating multiple techniques such as cytology, histopathology, and molecular studies demands a high level of competency. Yet, existing training often needs a comprehensive understanding of this intricate diagnostic process. Without proper guidance, bone marrow preparation and examination errors can lead to misdiagnoses and compromised patient care. Principles and Approaches to Diagnostic Bone Marrow Examination offers a structured solution for hematology trainees seeking to master bone marrow diagnosis. Divided into two sections, it covers fundamental knowledge and advanced diagnostic approaches. From the basics of sample preparation to the nuances of integrated diagnostic pathways, each aspect is meticulously detailed to ensure thorough comprehension and skill development.