On March 26, 2006, head CT without contrast: 1) Air-fluid level in the right maxillary sinus suggestive of acute sinusitis; 2) A 1.8-cm oval, low density mass in the dependent portion of the left maxillary sinus is consistent with a retention cyst; 3) Mucoparietal cell thickening in the right maxillary sinus and ethmoid sinuses.
On March 26 , 2006 , head CT without contrast : 1 ) Air - fluid level in the right maxillary sinus suggestive of acute sinusitis ; 2 ) A 1.8 - cm oval , low density mass in the dependent portion of the left maxillary sinus is consistent with a retention cyst ; 3 ) Mucoparietal cell thickening in the right maxillary sinus and ethmoid sinuses .