ABSTRACT
OBJECTIVE To investigate the characteristic computer tomography (CT) changes in cases of one-sided chronic ethmoid-maxillary sinusitis. METHODS The CT results of 76 patients diagnosed with one-sided chronic ethmoid-maxillary sinusitis were reviewed. RESULTS There were 51 patients with one-sided chronic ethmoid-maxillary sinusitis on the right side and 25 patients on the left side. There were 48 cases of obstruction of the ostium of the maxillary sinus. The characteristics of soft tissue lesions were mucosa hypertrophy and polypiform density spot. There were 9 cases with bony destruction. CONCLUSION More cases with pathologic changes on the left side were found. The obstruction of the ostium of the maxillary sinus and the abnormal anatomy of ostiomeatal complex were identified as important anatomical features of one-sided chronic ethmoid-maxillary sinusitis.