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.
Medical Definition of Flat feet. Flat feet: Absence of an arch in the sole of the foot that causes the foot to lie flat when the person is standing. All babies have flat feet because their arches are not yet built up (and their feet tend to be plump). This condition may persist into adulthood, or an arch may form as the child grows.