Gradenigo triad in unsafe ear

Extracranial complication of unsafe ear 

Atticoantral CSOM 

Cholesteatoma 

MRM =Modified Radical Mastoidectomy 

Gradenigo's triad= Petrous apex involvement 

U56 

• Ear discharge

• Abducens nerve (6th nerve) palsy (diplopia)

• Retro-orbital pain (due to 5th nerve trigeminal neuralgia)

Hitzelberger sign =Acoustic neuroma =CN8

Vestibulocochlear nerve 

BERA 

MRI mc cerebellopontine tumour 

Pressure on all nerves except 1 & 2 

5th nerve earliest to involve 

Loss of corneal reflex 

Gresingersign=Lateral sinus thrombophlebitis