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Arch Neurol. 2002;59:1027.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

A 50-YEAR-OLD woman, previously in good health, had a 6-week history of progressively worsening headache. Her symptoms markedly worsened on sitting or standing and were somewhat alleviated when she lay down. Neurologic examination results were normal apart from some neck stiffness.

Initial cranial computed tomographic (CT) scan results (not shown) were normal. Cerebrospinal fluid (CSF) opening pressure measured by lumbar puncture in the recumbent position was 3 cm of water. Magnetic resonance imaging (MRI) (Figure 1) revealed a general descent of the brain accompanying a Chiari type I malformation, expansion of the sellar contents, and bilateral subdural hygromas. Gadolinium contrasted views demonstrated striking, diffuse, pachymeningeal, and dural venous sinus enhancement.

Figure appears in full text version. A, T1-weighted sagittal magnetic resonance image (MRI) showing downward displacement of the cranial contents. The sellar contents are enlarged (black arrow); there is a Chiari type I malformation with descent of the cerebellar tonsils through the foramen magnum . . . [Full Text of this Article]

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