The skull of a child is thinner, allowing radiation to penetrate deeper compared with that of an adult, according to Dr. Keith Black, chairman of Cedars-Sinai Hospital's Department of Neurosurgery in Los Angeles.

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The public relations department at Cedars-Sinai Medical Center, the Los Angeles hospital where the rapper is reportedly being treated, did not confirm or deny that Lil Wayne is there, per its policy.

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Also unclear, according to Prediman K. Shah, a lipid expert at Cedars Sinai Hospital, is whether the drug will reverse plaque build-up as Esperion's drug did.

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