From: Cholesteatoma of the external ear canal: etiological factors, symptoms and clinical findings in a series of 48 cases
TM joint§
Mastoid
Middle ear
Tegmen
NVII erosion
Atticus
Antrum
No extension
Owen et al. 2006†
11 (23)
6 (13)
3 (6)
0
1 (2)
30 (63)
Heilbrun et al. 200314#
4 (31)
5 (38)
1 (8)
2 (15)
-