1*BONE MARROW EXTENSION IS VERY NON-SPECIFIC AND MAY BEEN SEEN IN: POLYCYTHAEMIA; HEMOLYTIC ANAEMIA; CHRONIC ANAEMIA CAUSED BY BLOOD LOSS; MEGALOBLASTIC ANAEMIA (B12, FOLATE); LEUKAEMIA, LYMPHOMA AND SOME CANCERS* *A MARROW SCAN IS RARELY DIAGNOSTIC ALONE. IT MUST BE INTERPRETED IN THE LIGHT OF KNOWN CLINICAL AND HEMATOLOGICAL FINDINGS*