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The most common disease process involving the frontal sinus is infection secondary to inadequate drainage through the frontal recess. Obstruction of the frontal recess may result from rhinosinusitis,allergic rhinitis, nasal polyposis, tumor and traumatic injury. The principle treatments are not only ventilation and drainage but also removal of predisposing factors. If there is no response to conservative treatment, surgical treatment is considered. To prevent closure of the frontal recess, external approach, endoscopic approach, grafts, indwelling tubes and mucoperiosteal flaps have been used. Insertion of silicone tube in frontal recess is a simple and easy method of drainage through frontal recess. We report a case of traumatic recurrent frontal sinusitis which was treated by endoscopic sinus surgery with silicone T-tube insertion. Korean J Otorhinolaryngol-Head Neck Surg 2010;53:50-3