Radiation therapy-induced cyst 89 months after AVM treatment

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Radiation therapy-induced cyst 89 months after AVM treatment Radiation therapy-induced cyst 89 months after AVM treatment.A, T2-weighted axial image shows a 3-cm cyst in the frontoparietal region with vasogenic edema (arrow).B, Contrast-enhanced T1-weighted axial image shows nodular contrast enhancement superficial t... Radiation therapy-induced cyst 89 months after AVM treatment.A, T2-weighted axial image shows a 3-cm cyst in the frontoparietal region with vasogenic edema (arrow).B, Contrast-enhanced T1-weighted axial image shows nodular contrast enhancement superficial to the cyst (arrow).C, Postoperative CT showed successful cyst decompression (arrow) after cystoperitoneal shunt placement. Whitney B. Edmister et al. AJNR Am J Neuroradiol 2005;26:1152-1157 ©2005 by American Society of Neuroradiology