Blood cancers, such as leukaemia, lymphoma, and myeloma, affect vital components like the blood, bone marrow, lymph, and spleen. Diagnosing these cancers is often challenging due to overlapping symptoms with other illnesses. Early and accurate diagnosis is key to effective treatment. Two primary diagnostic tools—bone marrow biopsies and blood tests—serve unique roles in this process. This article explores their differences and significance in diagnosing blood cancers and related conditions, o...