Spontaneous Skull Base Meningoencephaloceles and Cerebrospinal Fluid Fistulas
| Autor: | Mar Jimenez De La Peña, Manuel Recio Rodríguez, Anne Gomez Caicoya, Vicente Martínez de Vega Fernández, Elena Alvarez Moreno, Raquel Cano Alonso |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Adult
Male Skull Base Fistula Cerebrospinal Fluid Rhinorrhea business.industry Anatomy Middle Aged Magnetic Resonance Imaging Meningocele Skull Cerebrospinal fluid medicine.anatomical_structure medicine Humans Mr cisternography Female Radiology Nuclear Medicine and imaging Tomography X-Ray Computed business Aged Encephalocele |
| Zdroj: | RadioGraphics. 33:553-570 |
| ISSN: | 1527-1323 0271-5333 |
| DOI: | 10.1148/rg.332125028 |
| Popis: | Cerebrospinal fluid (CSF) fistulas are characterized by the egress of CSF from the intracranial cavity through an osteodural disruption between the subarachnoid space and a pneumatized structure within the skull base. Depending on the cause, CSF fistulas are classified as acquired or congenital, and acquired fistulas are further classified as traumatic, nontraumatic, or spontaneous. Spontaneous CSF fistulas are considered to result from a multifactorial process and have been postulated to represent a variant of idiopathic intracranial hypertension. However, an anatomic predisposition involving thinning of the cranial base, such as pneumatization of the sinus walls, must also be present. This process creates areas of structural weakness that act as potential pathways for CSF leaks, which most commonly occur in the ethmoid roof, sphenoid sinus, and temporal bone. Because CSF leaks may be overlooked, a result of their asymptomatic or subtle, intermittent course, a high level of suspicion is crucial in making an early diagnosis. However, CSF fistulas may be well seen at computed tomography (CT), which depicts bone defects, and magnetic resonance cisternography, which reveals the contents of herniated tissue. Knowledge of the location and size of the bone defect and herniated contents is crucial for the selection of surgical approach and grafting material. |
| Databáze: | OpenAIRE |
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