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Article Abstract
A teenager who suffered from left hemiparesis after traumatic brain injury underwent 18F-THK5351 PET 48, 286, and 810 days after the injury. The first scan showed slight uptake in the right corticospinal tract (CST), and the second scan showed intense uptake along the CST, which was significantly reduced in the third scan. The hemiparesis has improved between the first and second scans. 18F-THK5351 binds to monoamine oxidase B, which is expressed in reactive astrocytes (RAs). Recently, the beneficial role of RAs in plasticity and reconstruction after traumatic brain injury has been reported. 18F-THK5351 uptake may represent axonal remodeling accompanied with RAs in the CST.
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