전두와의 해부학적 변이와 전두동염：부비동 전산화단층촬영을 이용한 분석

Background and Objectives：The frontal recess (FR) cells, including the frontal cell (FC), agger nasi cell (ANC), supraorbital ethmoid cell (SOC) and inter-frontal sinus septal cell (IFSSC), can interfere with the drainage system of the frontal sinus. We evaluated the relationship between the FR cells and the frontal sinusitis. Subjects and Methods：All paranasal sinus CT scans performed from July 2004 through June 2005 were reviewed. Of the 675 scans reviewed, 317 patients (634 sides) were selected for data collection. Exclusion criteria included a clinical history of neoplasms, bony deformities, and extensive disease responsible for obscuring the bony anatomy. Similarly, CT scans with severe artifacts were also excluded. Result：FCs were present in 21.9% of the patients. According to the Bent’s classification, the prevalence of each FC type was as follows； type 1 FC (13.6%), type 2 FC (3.2%), type 3 FC (1.9%) and type 4 FC (3.1%). Of the four types of FR cells, type 4 had a significant association with frontal sinusitis. The incidence of hyperpneumatized frontal sinus, ANC, SOC, IFSSC were significantly higher among patients with the FC than those without the FC (p