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A new score for tomographic opacification of paranasal sinuses in children
Severino Aires de Araújo Neto1, Emílio Carlos Elias Baracat, Leonardo Franco Felipe
1Image Diagnosis Module of the Paraiba Medical School.
Unlabelled:
Many score methods have been created to measure paranasal sinus abnormalities seen under CT scan. Currently, the Lund-Mackay staging system is widely accepted. However, its results may be affected by the development in children.
Aim:
To assess the precision and accuracy of a new tomography score, called "opacification-development ratio". It translates the percentage of sinus area that is opaque.
Materials And Methods:
A cross-sectional study was prospectively conducted in patients ranging from 0-18 years of age who underwent CT scan assessment of rhinosinusitis. Two independent radiologists examined each scan twice, using both the Lund system and the ratio herein proposed.
Results:
The opacification-development ratio reached substantial intra and inter-examiner agreement, similar to the Lund system (Kappa > 0.60). Considering the Lund system as the gold standard, the most accurate cut-off point was approximately 15 (sensitivity and specificity approach 90%). There was a strong linear correlation between the two methods (r > 90).
Conclusions:
opacification-development ratio is precise and correlates with the Lund system. A cut-off point set at 15 could be used to call a test positive.
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