Prospective Study of Sinonasal and Skull-base Tumours Management

This observational prospective clinical study aims to describe the epidemiology, management and outcome of patients with sinonasal and skull-base pathology (tumours and diseases with malignant clinical characteristics) in a tertiary otorhinolaryngology referral centre. The main questions it aims to answer are: * what is the caseload of patients with the included pathology in our centre * what are the results of management of these cases * what are the epidemiological characteristics of included patients * what is the quality of life of included patients.