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Unilateral sinusitis from infected tooth is not uncommon , called Odontogenic sinusitis.When your upper teeth become infected with bacteria, the infection may extend to the maxillary sinuses causing you to experience symptoms similar to sinusitis. Direct spread of dental infections into the maxillary sinus is possible due to the close relationship of the maxillary posterior teeth to the maxillary sinus.
Here such a unilateral sinusitis is being treated by FESS by Dr.K.O.Paulose FRCS DLO,Jubilee Hospital, Trivandrum, South India