Barkovich A J, Newton T H
Department of Radiology, Letterman Army Medical Center, Presidio of San Francisco, CA 94129-6700.
AJNR Am J Neuroradiol. 1989 May-Jun;10(3):471-6.
The MR scans of 18 patients with nontumoral aqueductal stenosis and six patients with neoplastic stenosis of the aqueduct were reviewed in order to document and understand the variable appearance of the aqueduct and periaqueductal region on MR. The mesencephalic tectum is often distorted in patients with benign aqueductal narrowing. This distortion results in a number of different MR appearances ranging from an elongated and thin to a short and broad tectum. When compressed by a dilated suprapineal recess, the distorted tectum is sometimes difficult to differentiate from the bulbous enlargement caused by a tectal glioma. Patients in whom distortion of the tectum is the result of hydrocephalus and aqueductal stenosis should be recognized to avoid unnecessary diagnostic procedures and misdiagnosis.
回顾了18例非肿瘤性导水管狭窄患者和6例肿瘤性导水管狭窄患者的磁共振成像（MR）扫描结果，以便记录和了解导水管及导水管周围区域在MR上的多样表现。在良性导水管狭窄患者中，中脑顶盖常发生变形。这种变形导致多种不同的MR表现，从中脑顶盖细长变薄到短粗不等。当被扩张的松果体上隐窝压迫时，变形的中脑顶盖有时难以与顶盖胶质瘤引起的球样增大相鉴别。应识别出中脑顶盖变形是脑积水和导水管狭窄所致的患者，以避免不必要的诊断程序和误诊。
