Objective:To study CT and MRI manifestations and diagnostic value of choroidal fissure neuroepithelial cyst of the brain.Methods:Characteristic CT and MRI findings of 17 patients with choroidal fissure neuroepithelial cyst were retrospectively analyzed,CT scanning was applied 9 cases and 6 cases accepted further examination by MRI;MRI was performed in 14 cases and 5 cases accepted further MRI enhanced scanning.Results:CT findings were as follows:round or round-like shape with sharp rims and hypodensity;On MRI,they all showed hypointensity on T1WI and hyperintensity on T2WI,but cyst appeared hypointensity in FLAIR sequence,and no associated edema.Gd-DTPA was performed in 5 cases and revealed no evidence of enhancement.And no dramatic changes in follow-up studies.Conclusions:Choroidal fissure neuroepithelial cyst could be detected on both CT and MRI,but MRI with multiple planes and sequences,and could see the choroidal fissure clearly.MRI was better than CT in diagnosing choroidal fissure neuroepithelial cyst.