X
0
1
2
3
4
Cholesteatoma extension
Cholesteatoma extensionX
Not Identifiable (Not specified)
a) Supra- or infralabyrinthine extension of tympanomastoid cholesteatoma
b) Petrous apex cholesteatoma
Ossicular chain status
(at the end of surgery)
Ossicular chain status
(at the end of surgery)X
(at the end of surgery)X
Not Identifiable (Not specified)
Life threatening
complications
Life threatening
complicationsX
complicationsX
Not Identifiable (Not specified)
None
Extracranial complication
Intracranial complications
Eustachian tube vent. & mastoid pneumatisation
Eustachian tube vent. & mastoid pneumatisationX
Not Identifiable (Not specified)
Moderate to good pneumatization good ventilation
> 50 % of cells aereated
> 50 % of cells aereated
Moderate to good pneumatization poor ventilation
< 50 % of cells aereated
< 50 % of cells aereated
Sclerotic mastoid
Poor pneumatisation and ventilation
Poor pneumatisation and ventilation