Diseases of The Middle Ear
Colesteotoma is seen in: [LQ]
|C||Secretory ottitis media|
Cholesteatoma is presence of keratinising squamous epithelium in middle ear.
No HIO of previous otitis media or
pre existing perforation
Most common cause is formation of
retraction pocket of pass flaccid a in which
keratin debris accumulates
Occurs in pre existing perforation in pars tensa
• Acute necrotizing otitis mediaQ
• Attico antral/Unsafe CSO
• These perforations result in squamous epithelial
migration from tympanic membrane
• It can also result from implantation of squamous
epithelium into the middle ear during surgery.