Delayed presentation of primary parenchymal arachnoid cyst in adult population: a rare location of a common cyst—case report and review of the literature

Background Arachnoid cysts account for about 1% of all intracranial mass lesions. Intraparenchymal arachnoid cysts are an uncommon entity. Only a few reports are available in adults with the intraparenchymal arachnoid cyst.