On 2015 Jan 01, Prashant Sharma, MD, DM commented:

Please note that these extremely precious specimens in these tiny humans were obtained by trained pathologists, and not neonatologists, pediatricians or radiologists.

Just as is the case for fine needle aspirates, the best bone marrow specimens with highest diagnostic yields and lowest inadequacy rates come when pathologists themselves take the specimen they are to subsequently analyze.

There are of course many other issues (logistic, training, regulatory, safety) that are tied up with this fact, but the above, in my experience, is invariable.

On 2015 Jan 01, Prashant Sharma, MD, DM commented:

Please note that these extremely precious specimens in these tiny humans were obtained by trained pathologists, and not neonatologists, pediatricians or radiologists.

Just as is the case for fine needle aspirates, the best bone marrow specimens with highest diagnostic yields and lowest inadequacy rates come when pathologists themselves take the specimen they are to subsequently analyze.

There are of course many other issues (logistic, training, regulatory, safety) that are tied up with this fact, but the above, in my experience, is invariable.