Cholesteatoma mnemonic

CRUSH RBI MEn(RBI means Reserve bank of India)

C=Congenital theory     R=Resting cells

R=Ruedi's theory           B=Basal cell hyperplasia

U=Wittmaack theory     I=Invagination of TM

(W means double UU)

S=Sade's theory.            M=Metaplasia

H=Haberman theory     E=Epithelial invasion

TM means Tympanic membrane.

Cholesteatoma is of 3 types

1.CONGENITAL

2.ACQUIRED, PRIMARY ( means NO pre-existing perforation)

3.ACQUIRED,SECONDARY (means pre-existing perforation was present)

Congenital cholesteatoma theory of origin is congenital theory.

Primary,acquired cholesteatoma theory of origin can only be explained by MIB(Men in Black)

M= metaplasia

I= invagination of TM

B=  basal cell hyperplasia

Secondary,acquired cholesteatoma theory of origin is Most Easy

M= Metaplasia

E=Epithelial invasion