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Type:
Educational Exhibit
Keywords:
CNS, Anatomy, MR, Diagnostic procedure, Cerebrospinal fluid, Congenital, Hernia
Authors:
H. Mukai, H. Yokota, T. Horikoshi, K. Motoori, T. Uno; Chiba/JP
DOI:
10.1594/ecr2014/C-0959
Conclusion
CTH are very different and the clinical outcomes are varied.
One of the congenital causes is hypoplasia of the posterior fossa.
Mesodermal insufficiency induces Chiari malformation type I.
Chiari malformation type II is induced by poor development of the primitive ventricle due to discharge of cerebrospinal fluid into the amniotic cavity.
Synostosis of the lambdoid suture causes a shallow posterior fossa on craniosynostoses,
for example Crouzon disease.
Acquired causes include mass effect by tumors,
intracranial hypertension,
lumboperitoneal shunt,
idiopathic and postoperative intracranial hypotension.
Their mechanisms can be divided to depression from the posterior fossa and traction from the spinal canal.
The causes are not only organic but also functional.
It is reported that acromegaly induces CTH due to increased volume of the brain.
CTH is not rare.
Interpreting image characteristics and pathogenesis makes understanding clinical significance on each disorder with CTH.