“…Stemming from this, investigators have tried to employ demographic (age, gender, race, ethnicity), clinico-pathological criteria (tumor size, radiation history, family history, multifocality, and coexisting thyroid pathology) to better predict the risk of malignancy in HCN. Older age was found to be significantly associated with malignancy in some studies [43,44]; however, others found no significant association [16,22,45,46]. Similarly, contradictory findings were reported concerning gender association [20,27,47,48].…”