a review of 56 cases of periorbital cellulitis indicated that the patients could be divided into three groups : group 1 , cases secondary to paranasal sinusitis , more correctly termed inflammatory edema because the periorbital swelling is due to venous obstruction ( a specific bacterial etiology is rarely documented in these patients because aspiration and culture of the sinuses are usually not performed and the infection is not associated with bacterial invasion of either the soft tissue or the blood stream ) ;
C0037199
sinusitis
C0009450
infection