Nasal Vestibule Carcinoma

The goal of this observational study is to learn about survival and prognostic factors in patients who underwent surgical treatment for primary squamous cell carcinoma of the nasal vestibule. The main questions it aims to answer are: * what is the prognosis of patients affected by squamous cell carcinoma of the nasal vestibule? * are there any specific factors that could influence prognosis? * is it possible to elaborate a new staging system, able to overcome the limitations of the currently used ones? Data about patients, tumour and type of surgery performed will be collected. Participants will be followed-up for a minimum 6 months period after surgery.