Table I.

Hearing preservation surgery (1976-2009) in 322 cases. Guidelines for inclusion were size of tumour and hearing.

Series	Inclusion criteria Ø, PTA/SDS	No. of cases	Short-term preserved hearing (A-B class)
I (1976-2000)	≤ 20 mm,50/50	207	27%
II (2000-2002)	≤ 15 mm, 30/70	51	32%
III (2002-2009)	≤ 10 mm, 30/70	64	50%