revision functional endoscopic sinus surgery objective and subjective surgical outcomes background the aim of this study was to report objective and subjective outcomes after revision sinus surgery ress for chronic rhinosinusitis crsmethods we performed a retrospective analysis of prospectively collected data in 125 patients requiring revision functional endoscopic sinus surgery after failing both maximum medical therapy and prior sinus surgery for crs patients were seen and treated over a 3year period 19992001 in a tertiary rhinology setting computed tomography ct scans were graded as per lundmackay and patient symptom scores were recorded using the sinonasal outcome test 20 snot20 instrument individual rhinosinusitis symptoms were evaluated on a visual analog scale 010 before and after surgery all patients had a minimum 2year followupresults the mean number of prior sinus procedures was 19 01 range 17 and the mean preoperative ct grade was 134 07 patients with asthma and polyposis had higher ct scores than those without these processes preoperative mean snot20 and endoscopy scores were 307 13 and 73 04 respectively at the 2year followup mean snot20 and endoscopy scores improved to 77 06 and 21 04 respectively p 28 x 1010 at 12month followup each individual symptom score decreased significantly overall 10 patients failed ress and required additional surgical intervention for an overall failure rate of 80 all patients who failed ress had nasal polyposisconclusion revision functional endoscopic sinus surgery benefits patients that fail maximum medical therapy and prior sinus surgery for crs by objective and subjective measures