The Chiari 1.5 malformation is defined as a tonsillar herniation within a Chiari I malformation with additional caudal descent of the brainstem through the foramen magnum. We describe a …

Chiari 1.5 is a variant of a Chiari 1 (the most common type of Chiari Malformation). A Chiari 1.5 is defined as an “Advanced Form of Chiari 1 Malformation” [1] or a more complicated form of CM …

2024年9月22日 · Chiari 1.5 malformation, or bulbar variant of Chiari I malformation, is a term used in the literature to describe the combination of cerebellar tonsillar herniation (as seen in Chiari …

Traditionally the Chiari malformations include four separate anatomical entities, all of which involve the hindbrain. Type I is defined as inferior displacement of the cerebellar tonsils …

2021年3月3日 · An improved understanding of the odontoid synchondroses could lead to better understanding of Chiari malformations and lead to improved treatment of patients with these …

2023年9月4日 · Arnold-Chiari, or simply Chiari malformation, is the name given to a group of deformities of the posterior fossa and hindbrain (cerebellum, pons, and medulla oblongata). …

2017年7月31日 · With a herniated brainstem, the malformation fails to meet the criteria for a Chiari 1, but without the fourth ventricle being herniated or the vermian hypoplasia, it fails to …

No single sign or symptom was found to be peculiar to the Chiari 1.5 malformation, although all patients in whom this diagnosis was established had undergone a posterior fossa …

Chiari 1.5 patients appeared to demonstrate greater tonsillar descent with 54 versus 18% descent to C2. Overall outcomes were similar, with 82% of Chiari 1.5 patients improving versus 76% of …

2024年10月26日 · Terminology. The description of 'malformation' may not be accurate for Chiari 0, 0.5, 1 and 1.5 because there is evidence that these are defects acquired after birth 8.Thus, …