Magnetic resonance imaging of Chiari malformations.
The authors describe the features of magnetic resonance (MR) images of Chiari type I and II malformations and present four illustrative cases. Downward displacement of the posterior fossa was more pronounced with type II than type I. A variety of intracranial anomalies were associated with the Chiari type II malformation, whereas type I was mainly associated with syringomyelia and craniovertebral changes. MR imaging is useful in the diagnosis of intracranial anomalies and those situated at the craniovertebral junction, including Chiari malformations.
Department of Neurosurgery, Hiroshima University School of Medicine.
M
M
Yamanaka
T
T
Uozumi
K
K
Sakoda
S
S
Kuwabara
T
T
Mikami
M
M
Sumida
J
J
Hasada
T
T
Hatayama
J
J
Kanazawa
T
T
Kajima
D000328:Adult; D001139:Arnold-Chiari Malformation / Q000150:complications / Q000175:diagnosis*; D005260:Female; D006801:Humans; D007223:Infant; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D013595:Syringomyelia / Q000175:diagnosis / Q000209:etiology