Discussion of Intracranial hypotension
- Intracranial hypotension results from leakeage of cerebrospinal fluid.
- Intracranial hypotension may be caused by a skull fracture with leakage of cerebrospinal fluid. More often, it may follow an uncomplicated lumbar puncture; however, in many cases it is idiopathic.
- Patients often present with postural headaches.
 Imaging Findings for Intracranial hypotension
- MR imaging is relatively sensitive and specific in the detection of benign or spontaneous intracranial hypotension.
- The classic imaging features include:
- Thick linear enhancement of the pachymeninges, no enhancement of the sulci or brain surface, enhancement above and below the tentorium
- Enlargement of the pituitary gland
- Descent of the brain (low cerebellar tonsils)
- Subdural effusions (or hemorrhage in some patients)
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 References for Intracranial hypotension
- James G. Smirniotopoulos, Frances M. Murphy, Elizabeth J. Rushing, John H. Rees, and Jason W. Schroeder. From the Archives of the AFIP: Patterns of Contrast Enhancement in the Brain and Meninges. RadioGraphics 2007 27: 525-551.