Otology MCQ 3

Cholesteatoma is commonly caused by: [AIPGMEE – 1994]

1) Attico-antral perforation
2) Tubo-tympanic disease
3) Central perforation of the Tympanic membrane
4) Meniere’s disease

Cholesteatoma is a sac of keratinised squamous epithelial cell in the middle ear or mastoid. They have properties of bone erosion.
They are of 4 types :

  1. Congenital
  2. Primary acquired (without pre-existing perforation. D/t pars tensa invaginations, basal cell hyperplasia/ metaplasia)
  3. Secondary acquired (following marginal or subtotal perforation. D/t epithelial migration and metaplasia.)
  4. Tertiary / Iatrogenic (following surgery. example: when effective de-epithelialisation of the tympanic membrane remnants not done in graft procedure)

Ans: A

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