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From the Departments of Neurosurgery (Drs. Kurita, Kawamoto, Sasaki, Shin, Ueki, and Kirino) and Radiology (Drs. Momose and Terahara), Faculty of Medicine, University of Tokyo, Japan.
Address correspondence and reprint requests to Dr. Hiroki Kurita, Neurochirurgische Universitätsklinik, Albert-Ludwings-Universität Freiburg, Breisacher Stroße 64, D-79106, Freiburg, Germany.
A patient with a 3-year history of progressive hemiballism presented with an unruptured arteriovenous malformation (AVM) in the contralateral caudate nucleus and putamen. PET demonstrated a matched reduction of cerebral blood flow (CBF) and cerebral metabolic rate of oxygen (CMRO2) in the basal ganglia and adjacent frontal lobe. The patient underwent radiosurgery for the AVM. After a period of no clinical change for 6 months, the movement disorder resolved by month 7 post-treatment. The AVM was successfully obliterated 2 years after irradiation without any significant change in the regional CBF or CMRO2.
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