The goal of this observational study is to develop a questionnaire for measuring swallowing and throat discomfort symptoms in patients with goiter or thyroidectomy, which complies with the model of Rasch and which satisfies the fundamental measurement axioms (e.g., unidimensionality, linearity, generalizability). Developing a scale with such characteristics would provide clinicians and researchers with a reliable tool for assessing the impact of goiter and for measuring the outcomes after surgery. Also, the study will assess the psychological impact of goiter and thyroidectomy, as well as the characteristics of the surgical scar after thyroidectomy. The questionnaire will be developed in the first phase of the study. Items and response categories will be identified through interviews performed with patients affected by goiter or after thyroidectomy. In the following phases of the study, the questionnaire will be administered to patients before and after thyroidectomy.