Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
Arnold-Chiari malformation CT
Introduction
Overview
Overview
CT scan may be helpful in the diagnosis of Arnold Chiari malformation. Findings on CT scan diagnostic of Arnold Chiari malformation depends on the subtype and include herniation of cerebellar tonsils, vermis, and lower brain stem, underdeveloped cerebellum and crowded foramen magnum.
CT scan
CT scan
CT scan may be helpful in the diagnosis of Arnold Chiari malformation. Findings on CT scan diagnostic of Arnold Chiari malformation depends on the subtype and include:[1][2]
- herniation of:
- Cerebellar tonsils and vermis
- lower brain stem
- Underdeveloped cerebellum
- Crowded foramen magnum
In the CT scan picture above:
- Red: tectal beaking
- Orange: corpus callosum dysgenesis
- Yellow: large mass intermedia
- Green: absence of fastigium
- Blue: low-lying tentorium/torcular
- Purple: vermian ectopia
References
References
- ↑ Cotes C, Bonfante E, Lazor J, Jadhav S, Caldas M, Swischuk L, Riascos R (June 2015). “Congenital basis of posterior fossa anomalies”. Neuroradiol J. 28 (3): 238–53. doi:10.1177/1971400915576665. PMC 4757284. PMID 26246090.
- ↑ Forbes, W. St. C.; Isherwood, I. (1978). “Computed tomography in syringomyelia and the associated Arnold-Chiari Type I malformation”. Neuroradiology. 15 (2): 73–78. doi:10.1007/BF00334118. ISSN 0028-3940.
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Fahimeh Shojaei, M.D.