Bone Marrow aspiration needle is an instrument used to aspirate Marrow from the Bone Bones commonly involved: Sternum or posterior iliac crests because they are superficial and make a note that all flat bones and vertebrae in the body contain bone marrow. Indications: Bone marrow infiltration: Leukaemia/lymphona Secondary carcinoma Myelofibrosis Cytopenias: Neutropenia thrombocytopenia Anemia Pancytopenia [&hellip