소아에서 부비동점막 이상 소견 : 뇌자기공명영상에서 우연히 발견되는 빈도 = Prevalence of Incidental Paranasal Sinus mucosal Abnormalities in Children on Brain MRI

다국어 초록 (Multilingual Abstract)

Purpose: Magnetic resonance imaging (MRI) is known to be the most accurate in the depiction of the paranasal sinus abnormalities. The frequency of incidental observation of paranasal sinus abnormality is reported as very high in previous CT studies. We postulated that the prevalence of the abnormality would be higher if the study was based on MRI studies. We evaluate the prevalence of the incidental paranasal sinus abnormalities seen on MRI.
Materials and Methods: We reviewed 287 MRI'S that were obtained for the reasons other than the evaluation of paranasal sinus disease between June 1, 1995 and May 31, 1998.
The diagnosis of sinus abnormality was entertained whenever the abnormal signal intensity was seen along the sinus wall or within the sinus cavity on T2 weighted axial images. We analyzed the overall incidence of sinus abnormality, age distribution and monthly distribution. Also, we evaluated the site of involvement and the severity f abnormality. The severity of abnormality was divided into the 5 grades; mild mucosal thickening, severe mucosal thickening, retention cyst, air-fluid level, and total opacity.
Results : The abnormality was observed in 39% of the study population. It was seen most frequently in the age group of 4 to 5 years with the relatively high incidence in patients aged between 2 and 8 years. There was no significant difference in the incidence between males and females. The prevalence was highest in May with relatively high incidence between December and May. The maxillary sinus was most commonly involved.
Conclusion : The paranasal sinus abnormality is frequently observed in brain MRI as an incidental finding in children. The incidence of abnormality is relatively high in children aged between 2 to 8 years. The abnormality was observed more frequently between December and May.