Radiology of cerebrospinal fluid rhinorrhea

Area of Science:

• Neurosurgery
• Radiology
• Otolaryngology

Background:

• Cerebrospinal fluid (CSF) rhinorrhea presents diagnostic challenges.
• Understanding the etiology distribution is crucial for patient management.
• Previous imaging modalities had limitations in localizing CSF leaks.

Purpose of the Study:

• To evaluate the diagnostic efficacy of various imaging techniques for CSF rhinorrhea.
• To compare the utility of plain films, tomography, and radioisotope cisternography.

Main Methods:

• Retrospective analysis of 51 patients with CSF rhinorrhea (1974-1977).
• Evaluation of plain skull films, tomography (PA and lateral), and radioisotope cisternography with intranasal pledgets.
• Correlation of imaging findings with leak site identification.

Main Results:

• Plain films identified the leak site in only 21% of patients.
• Tomography was helpful in 53%, particularly for traumatic non-postoperative leaks.
• Radioisotope cisternography localized the leak in 50% and suggested it in 25%, often succeeding where other methods failed.

Conclusions:

• Radioisotope cisternography with intranasal pledgets is a valuable tool for diagnosing CSF rhinorrhea.
• This method offers superior localization compared to conventional radiography and tomography.
• Findings support the use of radioisotope cisternography when initial imaging is inconclusive.