三叉神经瘤为罕见的颅内良性肿瘤,国内外有关CT的报道较少,本文介绍4例经CT检查及手术病理证实者,着重描述肿瘤的CT表现及主要鉴别诊断。检查方法采用东芝TCT-35A型头颅CT扫描机,矩阵240×240,扫描时间105秒。以听背线为基线,向上、下逐层扫描,包括全部病变及颅底,层面厚度10mm,层面间隔在颅底及颅凹部位采用5mm,至小脑幕以上采用10mm,先平扫,然后静脉注射60％泛影葡胺10ml行增强扫描。病例报道例1病程半年,有右侧Ⅴ—Ⅶ颅神经轻度受损征,临床怀疑右桥小脑角肿瘤,CT平扫无明显异常。注射造影剂后,于蝶鞍之后方及右侧环池内清晰地显示一类圆形增强块影,大小约15×21mm。CT值24-42Hu,边缘光整,其内有小点状低密度 Trigeminal neuroma is a rare intracranial benign tumor. There are few reports about CT at home and abroad. In this paper, 4 cases of CT confirmed by surgery and pathology were reviewed. The CT features and main differential diagnosis were mainly described. Inspection method using Toshiba TCT-35A head CT scanner, matrix 240 × 240, scanning time of 105 seconds. To listen to the back line as the baseline, up and down by layer scan, including all lesions and skull base, the thickness of 10mm, the level of the skull base and cranial concave site spacing 5mm, to the tentorium above the use of 10mm, first plain, and then vein Injection of 60% diatrizoate 10ml line enhanced scan. Cases reported cases of a course of six months, with right cranial nerve Ⅴ-Ⅶ mild damage, clinical suspicion of right cerebellopontine angle tumor, CT plain no obvious abnormalities. Injection of contrast agent, in the sella and right after the ring pool clearly shows a circular enhancement block shadow, the size of about 15 × 21mm. CT value of 24-42Hu, edge finishing, which has a small dot-like low density