Chiari malformation type II
MONDO:0008816Arnold-Chiari malformation type II is a rare, central nervous system malformation characterized by caudal displacement of the cerebellum, pons, medulla and fourth ventricle through the foramen magnum into the spinal canal, and is typically associated with myelomeningocele. Variable other central nervous system abnormalities might be present (partial or complete agenesis of the corpus callosum, a small fourth ventricle, obstructive hydrocephalus, falx and tentorium defects, and polygyria). Symptoms include hypotonia, apnea with cyanosis, dysphagia, opisthotonus, nystagmus, spasticity, ataxia, and occipital headache.
Also known as: Arnold-Chiari malformation type 2, Arnold-Chiari malformation type II, Chiari malformation type 2, Chiari malformation type II, Arnold Chiari malformation type II, Arnold-Chiari malformation, Chiari type II malformation, Cm2
4 clinical trials for this condition and its sub-types.
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Keyhole surgery in the womb could fix spina bifida with fewer risks
Disease control OngoingThis study tests a minimally invasive fetoscopic surgery to repair spina bifida in unborn babies. The goal is to close the spinal defect and reverse brain herniation while reducing risks like uterine rupture and preterm birth that come with open fetal surgery. Thirty pregnant wom…
Phase: NA • Sponsor: Johns Hopkins University • Aim: Disease control
Last updated Jun 27, 2026 12:06 UTC
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AI boosts brain scan accuracy in massive new trial
Diagnosis ENROLLING_BY_INVITATIONThis study tests whether an AI tool can help radiologists read brain CT and MRI scans more accurately and quickly. Researchers will compare how well doctors, AI alone, and doctors using AI together can spot abnormalities, urgent findings, and classify diseases. The goal is to red…
Sponsor: Yaou Liu • Aim: Diagnosis
Last updated Jun 27, 2026 11:00 UTC