Nemoto Y, Inoue Y, Fukuda T, Shakudo M, Katsuyama J, Hakuba A, Nishimura S, Onoyama Y
Department of Radiology, Osaka City University Medical School, Japan.
Neuroradiology. 1988;30(2):155-9. doi: 10.1007/BF00395617.
Two of three patients who proved to have symptomatic Rathke's cleft cysts presented with visual field deficit and all with diabetes insipidus. CT showed intra- and suprasellar cystic low density lesions with ring enhancement. MR showed intra- and suprasellar masses. On the T1-weighted images two of the three had hyperintense portions similar to fat and the other a hyperintense portion similar to white matter within the cysts. These portions were isointense to brain on the T2-weighted images in all cases. This characteristic intensity on MR images provides differentiation from cystic pituitary adenomas and cystic craniopharyngiomas, and leads to correct diagnosis of Rathke's cleft cyst.
在经证实患有症状性拉克氏裂囊肿的三名患者中，有两名出现视野缺损，且均患有尿崩症。CT显示鞍内和鞍上囊性低密度病变，有环状强化。MR显示鞍内和鞍上肿块。在T1加权图像上，三名患者中有两名囊肿内有类似于脂肪的高信号部分，另一名囊肿内有类似于白质的高信号部分。在所有病例中，这些部分在T2加权图像上与脑实质等信号。MR图像上的这种特征性信号强度有助于与囊性垂体腺瘤和囊性颅咽管瘤相鉴别，从而正确诊断拉克氏裂囊肿。
