Pars Tensa Retractions


In the same way that the pars flaccida is vulnerable to retraction, the pars tensa may also become retracted.  This usually occurs at the posterosuperior section of the pars tensa, where it may involve the long process of the incus, stapes and other middle ear structures.



Posteroinferior retraction of the tympanic membrane onto the round window and promontory.  The incudostapedial joint is just visible on the margin of the retraction.