Cochlear Implantation in Patients with Neurofibromatosis Type 2 and Patients with Vestibular Schwannoma in the Only Hearing Ear

Table 3

Case reports of patients with radio surgery for VS and cochlear implantation.

Author

Patients no.

Age

Radiation

Rx dose

Time to implantation (m)

Cause HL

Followup (m)

Cochlear implant PTA dB

Speech tests

Telephone

Daily use

EPT after VS Radiosurgery (m)

Lustig et al. [9] 2006

1

41

Yes

NA

NA

NF2

17

55

MTSr 46%

NA

Yes

NA

2

50

Yes

NA

NA

NF2

18

35

SDS 46%, HINT 98%

NA

Yes

NA

Tran Ba Huy et al. [30] 2009

1

20

Gamma

NA

24

NF2

48

NA

Phonemes 95%, CSWS 100%, OSWS 100%, OSSWLR 97%, OSSWLRWN 89%

Yes

NA

EPS 24 m +

1

52

ST

54 Gy 30 fr

60

NF2

36

NA

CUNY sentences in quiet 96%, CUNY sentences in noise 79%, CNC words 79%

NA

Yes

EPS 60 m +

Trotter and Briggs [13] 2010

2

41

ST

50.4 Gy 28 fr

7

NF2

12

NA

CUNY sentences in quiet 72%, CNC words 45%

NA

NA

EPS 7 m−

3

84

ST

12 Gy single fr

12

NF2

NA

NA

NA

NA

Yes

NA

NA: nonavailable; NF2: neurofibromatosis type 2; VS: vestibular schwannoma; ST: stereotactic radiation; Gy: gray unit; fr: fraction; MTSr: Monosyllable Trochee Spondee recognition; SDS: speech discrimination score; HINT: hearing in noise sentence testing; CSWS: closed set word score; OSWS: open-set word score; OSSLR: open set sentences with lip reading; OSSWLR: open set sentences without lip reading; OSSWLRWN: open-set sentences without lip reading with noise; EPT: electrical promontory test; EPS: electrical promontory stimulation; CUNY: City University of New York sentences; CNC: consonant nucleus consonant word lists.