Arnold-Chiari malformation diagnostic study of choice

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Fahimeh Shojaei, M.D.

Overview

MRI is the gold standard test for the diagnosis of Arnold Chiari malformation. Cerebellar tonsillar herniation, wedge shaped tonsils, syringohydromyelia, small posterior fossa, obstructive hydrocephalus, and brainstem anomalies.

MRI is the gold standard test for the diagnosis of Arnold Chiari malformation.^[1]^[2]

The following findings on performing MRI are confirmatory for Arnold Chiari malformation:

The various investigations must be performed in the following order:

There are no established criteria for the diagnosis of Arnold Chiari malformation.

↑ Meadows, Jeffery; Kraut, Michael; Guarnieri, Michael; Haroun, Raymond I.; Carson, Benjamin S. (2000). "Asymptomatic Chiari Type I malformations identified on magnetic resonance imaging". Journal of Neurosurgery. 92 (6): 920–926. doi:10.3171/jns.2000.92.6.0920. ISSN 0022-3085.
↑ Pillay, Prem K.; Awad, Issam A.; Little, John R.; Hahn, Joseph F. (1991). "Symptomatic Chiari Malformation in Adults: A New Classification Based on Magnetic Resonance Imaging with Clinical and Prognostic Significance". Neurosurgery. 28 (5): 639–645. doi:10.1227/00006123-199105000-00001. ISSN 0148-396X.