Journal of Research in Medical Sciences1735-199512320070719Bilateral maxillary sinus aplasia147149ENSeied MehdiSonbolestanSeied Mohammad JavadMarashiHamedAbasiOtolaryngology and Head & Neck Surgery Department, Isfahan University of Medical Sciences, Isfahan, Iran.. h_abasi@resident.mui.ac.ir200611262007051720070530Bilateral maxillary sinus aplasia is an extremely rare congenital anomaly. Only a few cases have been reported in the literature. We present a 24- year-old woman with bilateral maxillary sinus aplasia associated with the bilateral absenceof the uncinate process and infundibular passage on CT images.KEY WORDS: Maxillary sinus, aplasia, computed tomography.