Subdural Effusions in the Posterior Fossa Associated with Spontaneous Intracranial Hypotension

Misdiagnosis of spontaneous intracranial hypotension remains a problem, despite increasing recognition. Three patients with spontaneous intracranial hypotension presented with typical findings on lumbar puncture, magnetic resonance (MR) imaging, and radioisotope cisternography. All patients showed s...

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Bibliographic Details
Published in:Canadian journal of neurological sciences 2006-05, Vol.33 (2), p.205-208
Main Authors: Watanabe, Arata, Horikoshi, Toru, Uchida, Mikito, Koizumi, Hidehito, Yamazaki, Hiromichi, Kinouchi, Hiroyuki
Format: Article
Language:English
Subjects:
Adult
Age Factors
Aged
Biological and medical sciences
Brain Neoplasms - complications
Brain Neoplasms - diagnostic imaging
Brain Neoplasms - radiotherapy
Cerebrospinal fluid. Meninges. Spinal cord
Cranial Fossa, Posterior - diagnostic imaging
Cranial Fossa, Posterior - pathology
Cranial Fossa, Posterior - physiopathology
Dementia - complications
Diagnostic Techniques, Radioisotope
Dura Mater - diagnostic imaging
Dura Mater - pathology
Dura Mater - physiopathology
Female
Headache - etiology
Headache - physiopathology
Humans
Intracranial Hypotension - complications
Intracranial Hypotension - diagnostic imaging
Intracranial Hypotension - physiopathology
Magnetic Resonance Imaging
Male
Medical sciences
Middle Aged
Nervous system (semeiology, syndromes)
Neurology
Original Articles
Predictive Value of Tests
Radiography
Radiotherapy - adverse effects
Subdural Effusion - diagnostic imaging
Subdural Effusion - etiology
Subdural Effusion - physiopathology
Subdural Space - diagnostic imaging
Subdural Space - pathology
Subdural Space - physiopathology
Vascular diseases and vascular malformations of the nervous system
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Summary:Misdiagnosis of spontaneous intracranial hypotension remains a problem, despite increasing recognition. Three patients with spontaneous intracranial hypotension presented with typical findings on lumbar puncture, magnetic resonance (MR) imaging, and radioisotope cisternography. All patients showed subdural effusions in the posterior fossa on axial T2-weighted MR imaging. Axial MR images of 112 patients with other conditions were also screened for this finding. One of three patients had typical orthostatic headache, and the other two had continuous headache. The finding of subdural effusions in the posterior fossa on axial T2-weighted MR imaging disappeared after treatment. Similar findings were found in 14 of 112 patients with other conditions. Most of the patients were over 60 years old or had dementia or previous radiation therapy. Subdural effusions in the posterior fossa can be identified by T2-weighted axial MR imaging, and are useful for the diagnosis of spontaneous intracranial hypotension and for verifying the effectiveness of treatment.
ISSN:0317-1671
2057-0155
DOI:10.1017/S0317167100004984