Diseases of The Middle Ear
What is true in case of perforation of pars flaccida: [AIIMS May 2011]
|A||CSOM is a rare cause|
|B||Associated with cholesteatoma|
|C||Usually due to trauma|
|D||All of the above|
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.
Perforation in tympanic membrane can be in
• Occurs in tubotympanic type of
• Not associated with cholesteatoma
• Considered safe
Marginal (Perforation destroys even the annulus) theraby reaching sulcus tympanicus
Most common is posterio superior
- occur in attico antral type of CSOM
- associated with cholesteatoma
- considered unsafe / dangerous
Most common cause of perforation is chronic otitis media
F - Perforation of Pars FlaccidA.
A - Seen in Atticoantral/marginal perforation
M - Associated with CSOM (of atticoantral type) or acute necrotizing otitis media
o - Associated with Cholesteatoma
U - Unsafe type
S - Surgery is TOe.