The Role of Tympanic Membrane Retractions in Cholesteatoma Pathogenesis

Figure 1

Overall prevalence of tympanic membrane retraction in the contralateral ear according to the cholesteatoma growth pattern in the primary ear. PMC: posterior mesotympanic cholesteatoma. PEC: posterior epitympanic cholesteatoma. Two routes: two-route cholesteatoma. Undetermined: undetermined cholesteatoma. PF retraction: pars flaccida retraction. PT retraction: pars tensa retraction. Both: pars flaccida and pars tensa retraction.