NOSE AND PARANASAL SINUSES: Edited by Anshul SamaOlfactory improvement after endoscopic sinus surgeryRudmik, Lukea; Smith, Timothy L.b Author Information aDivision of Otolaryngology: Head and Neck Surgery, Department of Surgery, University of Calgary, Calgary, Alberta, Canada bDivision of Rhinology and Sinus Surgery, Oregon Sinus Center, Department of Otolaryngology: Head and Neck Surgery, Oregon Health and Science University, Portland, Oregon, USA Correspondence to Timothy L. Smith, MD, MPH, Division of Rhinology and Sinus Surgery, Department of Otolaryngology – Head and Neck Surgery, Oregon Health and Science University, 3181 SW Sam Jackson Park Rd PV-01, Portland, OR 97239, USA. Fax: +1 503 494 4631; e-mail: [email protected] Current Opinion in Otolaryngology & Head and Neck Surgery: February 2012 - Volume 20 - Issue 1 - p 29-32 doi: 10.1097/MOO.0b013e32834dfb3d Buy Metrics Abstract Purpose of review Olfactory dysfunction is a common complaint in patients with chronic rhinosinusitis (CRS). The purpose of this article is to review the current evidence on the impact of endoscopic sinus surgery (ESS) on CRS-related olfactory dysfunction. Recent findings The recent literature suggests that olfactory outcomes after ESS are challenging to predict. Some evidence supports a positive impact of ESS on improving olfactory outcomes in patients with preoperative nasal polyposis and anosmia. However, despite improvements in smell, most of these patients remain with severe hyposmia. One study suggests ESS has no impact on olfactory outcomes. Summary CRS-related olfactory dysfunction is a complex clinical scenario and it is challenging to predict improvement following ESS. CRS patients with anosmia and nasal polyposis preoperatively may have a higher likelihood of olfactory improvement following ESS. © 2012 Lippincott Williams & Wilkins, Inc.