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Arachnoid granulation cerebrospinal fluid otorrhea.
1Department of Otolaryngology and Communication Sciences, SUNY Health Science Center, Syracuse 13210.
The Annals of Otology, Rhinology, and Laryngology
|November 1, 1990
Summary
Arachnoid granulations (AGs) in the temporal bone can cause cerebrospinal fluid (CSF) otorrhea. Large AGs eroding bone are the primary cause of spontaneous CSF leaks in adults.
Area of Science:
- Otolaryngology
- Neurosurgery
- Pathology
Background:
- Cerebrospinal fluid (CSF) otorrhea is a rare condition often associated with temporal bone (TB) abnormalities.
- Arachnoid granulations (AGs) are common dural structures, but their role in spontaneous CSF otorrhea requires further elucidation.
Observation:
- A review of 188 temporal bones revealed 24 arachnoid granulations (AGs) in 16 specimens (8.5%).
- AGs ranged in size, with intermediate and large AGs (≥2.50 mm3) frequently associated with bone erosion and mastoid pneumatization.
Findings:
- Large AGs causing bone erosion were identified as the primary lesions responsible for spontaneous CSF otorrhea in adults.
- A case of CSF otorrhea due to a large AG successfully treated with surgical excision and dural repair is presented.
Implications:
- Understanding the pathology of AGs is crucial for diagnosing and managing spontaneous CSF otorrhea.
- Surgical intervention for large, erosive AGs offers a potential solution for patients with CSF otorrhea.