What is true in case of perforation of pars flaccida -: (A) CSOM is a rare cause, (B) Associated with cholesteatoma, (C) Usually due to trauma, (D) All of the above
Answer is B. Tympanic membrane can be divided in 2 parts:
Parstensa : It forms most of the tympanic membrane. Its periphery is thickened to form fibro cartilaginous 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.
Ref. Dhingra 6/e p59, 5/e p 78