Risk Factors for the Initial Misdiagnosis of Spontaneous Cerebrospinal Fluid Rhinorrhea

Area of Science:

• Neurosurgery
• Otolaryngology
• Radiology

Background:

• Spontaneous cerebrospinal fluid (CSF) rhinorrhea frequently presents with symptoms mimicking common sinonasal conditions.
• Delayed diagnosis of CSF rhinorrhea increases the risk of serious complications, such as meningitis.

Purpose of the Study:

• To investigate risk factors contributing to the initial misdiagnosis of spontaneous CSF rhinorrhea.
• To identify patient and provider characteristics associated with diagnostic delays.

Main Methods:

• Retrospective chart review of patients diagnosed with spontaneous CSF rhinorrhea.
• Comparison of patient demographics, initial provider specialty, and radiology report accuracy between correctly and incorrectly diagnosed groups.

Main Results:

• 61% of patients with spontaneous CSF rhinorrhea were initially misdiagnosed with conditions like rhinitis, sinusitis, or migraines.
• Initial consultation with a non-otolaryngology provider significantly increased the likelihood of misdiagnosis (83% vs. 36% for otolaryngologists).
• Radiology reports often failed to identify the skull base defect initially, but improved after CSF leak diagnosis.

Conclusions:

• Spontaneous CSF rhinorrhea is frequently misdiagnosed by both otolaryngologists and other specialists.
• Radiologists often miss skull base defects on imaging until a CSF leak diagnosis is established.
• Enhanced education for all healthcare providers on sinonasal symptom differentials is essential for timely CSF rhinorrhea diagnosis.