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Hesham Abd Elrahman, MD; David Malinvaud, MD; Nicolas A. Bonfils, MD; Rabii Daoud, MD; Michael Mimoun, MD; Pierre Bonfils, MD, PhD

Arch Otolaryngol Head Neck Surg. 2009;135(3):311-315.

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

INTRODUCTION

Cerebrospinal fluid (CSF) is produced by the choroid plexus of the lateral third and fourth ventricles at a rate of 0.35 mL/min. The CSF flows into the subarachnoid space and is absorbed by the arachnoid villi in the sagittal sinus. Normal CSF pressure is 5 to 15 cm H₂O. Neurologic symptoms may occur when CSF pressure reaches more than 15 to 20 cm H₂O.¹ Three concomitant factors are needed for CSF leakage: an osseous defect, a meningeal disruption, and a pressure gradient.²

Cerebrospinal fluid rhinorrhea may be classified as a function of its site, its cause, and the intensity of intracranial pressure. Nontraumatic fistulas with normal intracranial pressure (4% of all fistulas) constitute a challenge because of their unclear pathophysiologic features.³ Some authors have used the term . . . [Full Text of this Article]

REPORT OF CASES

CASE 1

CASE 2

COMMENT

CONCLUSIONS

AUTHOR INFORMATION

Author Affiliations: Department of Otorhinolaryngology, Georges Pompidou European Hospital, University of Paris–Descartes, Faculty of Medicine, Paris, France (Drs Elrahman, Malinvaud, N. A. Bonfils, Daoud, Mimoun, and P. Bonfils); and Faculty of Medicine, Benha University, Benha, Egypt (Dr Elrahman).

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