Table 1.

Classification of tympanic membrane pars tensa, and pars flaxida retractions according to Sade and Berco[1]

Classification of tympanic membrane retractions
Localization	Stage	Description
Pars tensa	Mild	Medial dislocation of the TM without extending to the ossicular chain or promontory
	Moderate	TM retraction extending, and contacting the incus
	Severe	Medialization of TM, which induces bony erosion and/or extending and contacting promontory
Pars flaxida	Mild	Minimum medial displacement of the TM
	Moderate	Medial dislocation of the TM extending and contacting the neck of malleus
	Severe	Medial dislocation of TM with adhesion and some bony erosion of incus

TM: Tympanic membrane.