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What is Schwartz operation is done in - and explain in detail?
Indications of simple / cortical mastoidectomy (Schwartz operation)

Acute coalescent mastoiditis.
Incompletely resolved acute otitis media with reservoir sign.
Masked mastoiditis.
As a initial step to perform:


Endolymphatic sac surgery
Decompression of facial nerve
Translabyrinthine or retrolabyrinthine procedures for acoustic neuroma.