Table 1.

Cohort of 45 patients, classified according to sex, side of the lesion, age at the time of surgery, diagnosis, location and size of the lesion.

N.	Sex	Side	Age	Diagnosis	Etiology	Location	Size	Surgery	Preoperative PTA*
1	M	left	56	TD	Iatrogenic (CSF leak in previous surgery for neurinoma)	AP	>10 mm	STP	28 dB
2	F	left	66	MEH	Cholesteatoma	P	≤10 mm	STP	50 dB
3	M	right	67	TD	Cholesteatoma	P	>10 mm	STP	55 dB
4	F	left	81	MEH	Cholesteatoma	P	>10 mm	STP	anacusis
5	M	left	41	TD	Cholesteatoma	AP	>10 mm	STP	4 dB
6	F	left	46	MEH	Cholesteatoma	A	>10 mm	STP	anacusis
7	F	right	52	TD	Cholesteatoma	AP	>10 mm	STP	82 dB
8	M	left	44	MEH	Cholesteatoma	A	≤10 mm	MCF approach	36 dB
9	F	right	35	MEH	Cholesteatoma	A	≤10 mm	STP	74 dB
10	F	left	86	MEH	Cholesteatoma	P	>10 mm	STP	70 dB
11	F	left	76	TD	Cholesteatoma	AP	>10 mm	STP	26 dB
12	M	right	41	TD	Cholesteatoma	AP	>10 mm	STP	13 dB
13	M	left	26	MEH	Cholesteatoma	P	≤10 mm	Transmastoid technique	26 dB
14	F	right	65	MEH	Cholesteatoma	P	>10 mm	STP	anacusis
15	M	left	48	MEH	Previous trauma + CSF leak	AP	>10 mm	STP	24 dB
16	F	right	48	MEH	Cholesteatoma	AP	>10 mm	STP	37 dB
17	F	right	62	MEH	Cholesteatoma	AP	>10 mm	STP	18 dB
18	M	left	33	MEH	Cholesteatoma	P	>10 mm	STP	anacusis
19	M	right	51	MEH	Cholesteatoma	AP	>10 mm	STP	15 dB
20	M	left	65	TD	Cholesteatoma	P	≤10 mm	Transmastoid technique	32 dB
21	F	left	67	MEH	Cholesteatoma	AP	>10 mm	STP	41 dB
22	F	right	18	MEH	Cholesteatoma	P	≤10 mm	Transmastoid technique	10 dB
23	M	right	33	TD	Cholesteatoma	P	>10 mm	STP	anacusis
24	M	left	75	TD	Cholesteatoma	P	>10 mm	STP	100 dB
25	F	right	49	MEH	Previous traumatic injury	AP	>10 mm	STP	28 dB
26	F	left	80	MEH	Cholesteatoma	AP	>10 mm	STP	41 dB
27	F	left	31	TD	Cholesteatoma	P	≤10 mm	Transmastoid technique	11 dB
28	M	left	79	TD	Cholesteatoma	P	>10 mm	STP	57 dB
29	F	right	54	MEH	Cholesteatoma	P	≤10 mm	Transmastoid technique	20 dB
30	M	left	59	TD	Cholesteatoma	P	≤10 mm	Transmastoid technique	9 dB
31	F	left	44	MEH	Acute meningitis + CSF leak	P	≤10 mm	Transmastoid technique	5 dB
32	M	left	67	MEH	Cholesteatoma	AP	>10 mm	STP	69 dB
33	M	left	59	TD	Cholesteatoma	P	>10 mm	STP	anacusis
34	F	right	60	TD	Cholesteatoma	AP	>10 mm	STP	29 dB
35	M	right	18	TD	Cholesteatoma	P	>10 mm	STP	anacusis
36	F	right	49	TD	Cholesteatoma	P	≤10 mm	Transmastoid technique	10 dB
37	M	right	42	TD	Cholesteatoma	P	≤10 mm	Transmastoid technique	24 dB
38	F	right	70	MEH	Cholesteatoma	P	>10 mm	STP	58 dB
39	F	left	76	TD	Cholesteatoma	P	>10 mm	STP	63 dB
40	M	right	62	TD	Cholesteatoma	P	≤10 mm	Transmastoid technique
41	M	left	76	MEH	Cholesteatoma	A	≤10 mm	STP	45 dB
42	F	right	54	MEH	Cholesteatoma	A	≤10 mm	MCF approach	27 dB
43	F	right	50	MEH	Cholesteatoma	AP	>10 mm	STP	20 dB
44	M	right	75	MEH	Cholesteatoma	AP	>10 mm	STP	60 dB
45	M	left	29	MEH	Cholesteatoma	P	≤10 mm	Transmastoid technique	21 dB

Abbreviations: M, male; F, female; MEH, meningoencephalic herniation; TD, tegmen defect; CSF, Cerebrospinal Fluid; PTA, pure tone audiometry; STP, subtotal petrosectomy; MCF, middel cranial fossa; AP, anteroposterior; P, posterior; A, anterior. *(considering bone conduction and calculating the mean at 500, 1000, 2000 and 4000 Hz).