Keatosis obturans /canal wall cholesteatoma
defective epithelial migration and widening of EAC ley garda
Desquamated epithelial cells and cholesterol
Ass. with Bron ectasis +sinusitis
Signs : pearly white mass with keratin arranged in concentric layers
- Granuloma formation
T/t : Removal by instrumentation under GA/LA
BULLOUS MYRINGITIS / HEMORRHAGIC EXTERNA
-cause: virus - influenza
Bulla filles with haemorrhagic fluid
t/t: Analgesic topical A/b
-do not rupture bulla + avoid irrigation
Granular myringitis
-local trauma to pars tensa lead to epithelial denudation - heals by granulation tiss formation at its lateral surface
T/t : AGno3 ley cautery +A/b +steroids ear drops
NOte : ramsay hunt ma 5th 7th 8th CN involved
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