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Chiari malformation or Arnold–Chiari malformation should not be confused with Budd–Chiari syndrome, [53] a hepatic condition also named for Hans Chiari. In Pseudo-Chiari Malformation, leaking of CSF may cause displacement of the cerebellar tonsils and similar symptoms sufficient to be mistaken for a Chiari I malformation. [54]
Arnold–Chiari malformation, or simply "Chiari malformation", a malformation of the brain; Budd–Chiari syndrome, a disease with typical symptoms of abdominal pain, ascites and hepatomegaly caused by occlusion of the hepatic veins; Chiari–Frommel syndrome, an older term for hyperprolactinaemia with extended postpartum galactorrhea and ...
Arnold–Chiari malformation; B. Bannayan–Zonana syndrome; Bardet–Biedl syndrome; Barth syndrome; Basal-cell nevus syndrome; Beckwith–Wiedemann syndrome;
The Chiari Institute is a medical institution that focuses on the treatment of Arnold–Chiari malformation and syringomyelia. It was established in 2001 by the North Shore-LIJ Health System , and is located in Great Neck, New York . [ 1 ]
The currently accepted radiographic definition for a Chiari malformation is that cerebellar tonsils lie at least 5mm below the level of the foramen magnum. Some clinicians have reported that some patients appear to experience symptoms consistent with a Chiari malformation without radiographic evidence of tonsillar herniation.
The Chiari malformation may be asymptomatic or present with ataxia, spasticity or abnormalities in breathing, swallowing or sleeping. [ 6 ] Due to the impaired venous outflow, which may be further complicated with an Arnold–Chiari malformation, there is often a clinical image of hydrocephalus present.
Obstruction to CSF flow and/or absorption can occur in hydrocephalus (blockage in ventricles or subarachnoid space at base of brain, e.g., by Arnold–Chiari malformation), extensive meningeal disease (e.g., infection, carcinoma, granuloma, or hemorrhage), or obstruction in cerebral convexities and superior sagittal sinus (decreased absorption).
Colpocephaly is a cephalic disorder involving the disproportionate enlargement of the occipital horns of the lateral ventricles and is usually diagnosed early after birth due to seizures.
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