Multivariate Analysis of Risk Factors for Neck Metastases in Surgically Treated Parotid Carcinomas

Abstract
Olfactory dysfunction is caused by viral upper respiratory tract infection, chronic sinonasal inflammation, or head trauma. However, not many systemic studies have been performed with regard to the implication of chronic rhinosinusitis (CRS) in olfactory dysfunction, even though CRS is one of the most frequent causes of olfactory dysfunction and accounts for 21% to 25% of smell loss.1-5