Kucharczyk W, Peck W W, Kelly W M, Norman D, Newton T H
Department of Radiology, University of California, San Francisco.
Radiology. 1987 Nov;165(2):491-5. doi: 10.1148/radiology.165.2.3659372.
The authors retrospectively reviewed the clinical, computed tomography (CT), and magnetic resonance (MR) imaging findings in seven patients with pathologically proved Rathke cleft cysts. All the cysts were located in the anterior sella turcica or the anterior suprasellar cistern. Five cysts had both intra- and suprasellar components, one was entirely intrasellar, and the other was predominantly suprasellar in location. The size of the cysts ranged from 8 to 20 mm. CT scans demonstrated low-density homogeneous lesions in four cases. On MR images of three of these four cases, the cysts had the same intensity as cerebrospinal fluid on T1- and T2-weighted images, while in the fourth case, the cyst was hyperintense on the T1-weighted images. In the remaining three cases, CT showed slight hyperdensity relative to brain parenchyma, suggestive of contrast enhancement. MR showed signal heterogeneity of these lesions with focal components of diminished signal intensity of T2-weighted images. These same foci appeared iso- to slightly hyperintense on T1-weighted images.
作者回顾性分析了7例经病理证实的拉克氏裂囊肿患者的临床、计算机断层扫描（CT）及磁共振成像（MR）表现。所有囊肿均位于蝶鞍前部或鞍上池前部。5个囊肿同时具有鞍内和鞍上成分，1个完全位于鞍内，另1个主要位于鞍上。囊肿大小为8至20毫米。CT扫描显示4例为低密度均匀性病变。在这4例中的3例MR图像上，囊肿在T1加权和T2加权图像上与脑脊液信号强度相同，而第4例囊肿在T1加权图像上呈高信号。其余3例中，CT显示相对于脑实质有轻微高密度，提示有强化。MR显示这些病变信号不均匀，T2加权图像上有局灶性信号强度减低成分。这些相同病灶在T1加权图像上呈等信号至轻微高信号。
