A new ultrasound sign in the diagnosis of pediatric maxillary sinusitis

&nbsp; &nbsp;&nbsp;&nbsp; Background: Computed tomography scans (CT scan) and X-rays are used to diagnose paediatric maxillary sinusitis. This study aimed at exploring the diagnostic value of the conventional and colour Doppler ultrasounds and their specific findings in cases of paediatric sinusitis. &nbsp;&nbsp; Methods: A total of 60 children diagnosed with sinusitis were included in this study. The conventional and colour Doppler ultrasounds of the sinus were performed on each of them. The symptoms that suggested increased blood flow to the sinuses were interpreted as positive findings on the colour Doppler ultrasound and were named &ldquo;Ghasemi signs&rdquo; for the purpose of this study. Such symptoms included unilateral artery bumps on the front artery, reduction of arterial resistive index (RI) to less than 0.5, and diameter of 2 mm or above for maxillary arteries. Sensitivity, specificity, and positive and negative predictive values, and accuracy of the conventional and colour Doppler ultrasounds were also calculated. &nbsp;&nbsp; Results: Compared to CT scan, the conventional ultrasound showed sensitivity and specificity of 73.4% and 100%, respectively. Sensitivity and specificity for the colour Doppler ultrasound were 89.36% and 100%, respectively. The maxillary artery diameter in normal and affected maxillary sinuses were, respectively, 2.4 mm (2.1&ndash;2.6, 95% CI) and 1.7 mm (1.6&ndash;1.9, 95% CI), with p<0.001. The RI of the affected sinuses were 0.47 (0.45&ndash;0.49, 95% CI), and those of the normal sinuses were 0.58 (0.54&ndash;0.61, 95% CI), with p<0.001. &nbsp;&nbsp; Conclusion: The findings of this study revealed that the conventional ultrasound agrees with the CT scans in the diagnosis of paediatric maxillary sinusitis. This diagnostic modality becomes even more valuable when the colour Doppler is used, particularly when considering the specific symptoms (Ghasemi signs) suggested by this study.