van der Toom HFE, et al. - Utilizing a large patient cohort in the tertiary referral center, researchers assessed and contrasted the STAM classification, STAMCO classification and the EAONO/JOS staging system as predictors for cholesteatoma recidivism and postoperative hearing. For this analysis, 231 patients who had surgery for primary cholesteatoma between 2003 and December 2012 were involved and retrospectively classified and staged according to the STAM classification, STAMCO classification, and EAONO/JOS staging system. According to findings, the STAMCO classification is the best available predictor for recurrent cholesteatoma and holds the most promise for residual cholesteatoma prediction. Extension of cholesteatoma tends to be related to postoperative hearing and therefore postoperative hearing may be predicted by the classifications and staging systems.