Clinical Significance of Asymptomatic Sinus Abnormalities on Magnetic Resonance Imaging

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Abstract
Objective: To investigate the prevalence of abnormalities of the paranasal sinus detected by magnetic resonance imaging (MRI) in asymptomatic subjects. Design: Prospective study. Setting: Outpatient clinic. Patients: A total of 325 patients who underwent MRI for suspected intracranial disease. Of those, 257 patients lacked nasal or sinus symptoms. Results: Sinus abnormalities were seen on MRI in 153 (47.1%) of 325 patients, including 107 (41.6%) of the 257 asymptomatic patients. Subjects older than 50 years had a significantly higher frequency of sinus abnormalities on MRI (49.8%) vs those younger than 50 years (39.5%) (P<.05). The maxillary sinus abnormality was observed in 99 patients (38.5%) and the ethmoid sinus abnormality was observed in 52 (20.2%) (P<.01). The most common abnormality was mucosal thickening in the maxillary and ethmoid Conclusion: A high prevalence of sinus abnormalities was detected in asymptomatic subjects on MRI. Arch Otolaryngol Head Neck Surg. 1997;123:602-604