Test Details: A bone marrow examination may be used for many conditions. These include: - Anemia. - Blood cell conditions such as leukopenia, leucocytosis, thrombocytopenia, thrombocytosis, pancytopenia and polycythaemia. - Cancers of the blood or bone marrow including leukemias, lymphomas and multiple myeloma. - Cancers that have spread from another area such as the breast into the bone marrow. - Hemochromatosis. - Fevers of unknown origin.