Left Frontal Convexity Arachnoid Cyst Extending to Interhemispheric Fissure

Abstract

Convexity or interhemispheric fissure arachnoid cysts are rarely seen lesions (5%). Although they are usually asymptomatic and do not require treatment, neurological symptoms like headache and seizures should be considered for surgical approaches. We reported a 47-year-old man with severe headaches. Computed tomography revealed a cystic lesion on the left cerebral convexity extending to interhemispheric fissure. Magnetic resonance imaging revealed displacement of corpus callosum with a slight midline shift caused by an arachnoid cyst. A cystoperitoneal shunt was performed. Radiologically, the cyst was partially resolved after cystoperitoneal shunting. Arachnoid cyst can cause local ischemia that triggers symptoms via compression, which can require surgical management, but an optimal treatment method can not be determined.