<prompt> What is true in case of perforation of pars flaccida?CSOM is a rare causeAssociated with cholesteatomaUsually due to traumaAll of the above  <response>: Ans. B Associated with cholesteatomaTympanic membrane can be divided in 2 pas:Parstensa : It forms most of the tympanic membrane. Its periphery is thickened to form fibro cailaginous ring called as annulus tympanicus.Pars Falccida : It is situated above the lateral process of malleus between the notch of Rivinus and the anterior and posterior malleolar folD. Perforation in tympanic membrane can be in Central Occurs in tubotympanic type ofCSOM Not associated with cholesteatoma Considered safe Marginal Perforation destroys even the annulus theraby reaching sulcus tympanicusMost common is posterio superiormarqinal?- occur in attico antral type of CSOM- associated with cholesteatoma- considered unsafe dangerous Attic perforation NoteMost common cause of perforation is chronic otitis mediaMnemonicFamousF - Perforation of Pars FlaccidA.A - Seen in Atticoantralmarginal perforationM - Associated with CSOM of atticoantral type or acute necrotizing otitis mediao - Associated with CholesteatomaU - Unsafe typeS - Surgery is TOe. 