颅咽管瘤：9例的CT和MR成像

Craniopharyngioma: CT and MR imaging in nine cases.

作者信息

Freeman M P, Kessler R M, Allen J H, Price A C

机构信息

Department of Radiology and Radiological Sciences, Vanderbilt University of Medicine, Nashville, TN 37232.

出版信息

J Comput Assist Tomogr. 1987 Sep-Oct;11(5):810-4.

PMID:3655043

Abstract

Magnetic resonance (MR) imaging and CT examinations were performed in nine patients with surgically proven craniopharyngioma. Computed tomography was found to be superior to MR in detection of calcification and cyst formation. Extent of involvement of adjacent structures (e.g., optic chiasm, third ventricle, and intracavernous carotid artery) was more clearly delineated by MR. Craniopharyngioma fluid collections were found to be uniformly bright on T2-weighted sequences. However, on T1-weighted sequences, the signal intensity of the fluid ranged from hypointense to hyperintense, reflecting the heterogeneous contents of cysts in these tumors. Since calcification and cyst formation are hallmarks of craniopharyngiomas, we believe that CT is more specific than MR in diagnosis of craniopharyngiomas. Magnetic resonance, however, offers a more accurate assessment of the tumor extent.

摘要

对9例经手术证实为颅咽管瘤的患者进行了磁共振（MR）成像和CT检查。结果发现，在检测钙化和囊肿形成方面，CT优于MR。MR能更清晰地勾勒出相邻结构（如视交叉、第三脑室和海绵窦内颈动脉）的受累范围。颅咽管瘤的液性成分在T2加权序列上呈均匀高信号。然而，在T1加权序列上，液体的信号强度从低信号到高信号不等，反映了这些肿瘤囊肿内容物的异质性。由于钙化和囊肿形成是颅咽管瘤的特征，我们认为CT在颅咽管瘤的诊断中比MR更具特异性。然而，磁共振能更准确地评估肿瘤范围。