To do this, they may recommend having a medical procedure, such as a bone marrow aspiration or a bone marrow biopsy, to collect a sample of bone marrow. The results of a bone marrow aspiration and/or biopsy help doctors diagnose the following conditions: 1  An infection with an unknown cause. 2  Blood disorders.3  Chromosomal or genetic diseases. 4  Cancer of the blood cells, such as leukemia.he procedures can also be used to monitor the side effects of chemotherapy and determine whether the treatment is working. About the procedure. A bone marrow aspiration is a procedure that removes a sample of the liquid portion of bone marrow.
Princeton's WordNet(0.00 / 0 votes)Rate this definition: 1  two-dimensionality, flatness, planeness(noun) the property of having two dimensions. 2  flatness(noun) a want of animation or brilliance. 3  flatness(noun) a deficiency in flavor.
Top definition. flat. 1. The name given to an apartment which you rent weekly or monthly. 2. The name given to someone who is not cool and is dull and boring. 3. The name given to a woman with no or hardly any breasts. 4. Something which is level, does not decrease or increase.