A bone marrow biopsy may be ordered to investigate abnormal bone marrow or blood conditions, cancers, infections of unknown origin, and, in very rare cases, a genetic condition resulting in the buildup of iron in the blood. Are you seeing a hematologist or a hematologist/oncologist; what has he or she told you is under investigation? Please, ask them, you should be privy to this information. Good luck. I've had them, they're not too bad.