Case Report: Hypoplasia of Maxillary Sinus

Introduction: The etiology of the hypoplasia of the maxillary sinus is unknown, some authors believe that the hypothesis of the obstruction of the ostiomeatal complex would hinder the drainage of the sinus and would promote a negative pressure. Chronically, the negative pressure would be responsible for the collapse of the paranasal sinus and for morphologic alterations, could result in conditions as enophthalmos and hypoglobus. Many authors use the term syndrome of the silent sinus to describe the same entity, however, in different phase of evolution, diagnosed by computed tomography (CT) scan of the sinus.

Objective: The aim of this study is to report a case of hypoplasia of the maxillary sinus.

Case Report: This study reports a case of a 17-year-old female white patient residing in Itaperuna. The patient searched the otolaryngology unit, complaining of headache, associated to nasal obstruction and snoring. Unchanged Ectoscopy. She requested CT sinuses that showed a hypoplastic and veiled left maxillary sinus and obstruction of the ostium of the right maxillary sinus' drainage. The patient did a bilateral intranasal maxillary sinus endoscopic, and got a favorable outcome, and is under ambulatory monitoring.

Conclusion: Hypoplasia of the maxillary sinus is a rare condition, of unknown etiology, where occurs progressive decrease in the volume of the maxillary sinus because of the centripetal retraction of their walls. The diagnosis can be done from a CT of the sinus and the treatment is surgical, with aeration of the affected sinus. The patient evolves satisfactorily, and is under ambulatory monitoring.

Keywords: Maxillary sinus, hypoplasia, silent sinus.