Table 2.

Descriptive data on hTB cases with no hydrops evident throughout the cochlear duct.

Case#	Age	Sex M=1 F=2	Ear R=1 L=2	Elect- length	Sp Gang Af Ear	Sp Gang Non-af ear	Ostomy 1=yes 2=no	SV Fib 1=yes 2=no	Diagnosis
441	69	1	2	18	16,620	Missing	2	2	Ototoxicity drug unknown
554	59	2	2	13	27,972	NA	2	2	Sensorineural, cause undetermined
558	61	2	1	16	20,177	Implant	2	2	Sensorineural, cause undetermined
558	61	2	2	20	24,398	Implant	2	2	Sensorineural, cause undetermined
658	80	1	2	6	6,435	3,135	2	2	Sensorineural, hereditary
709	70	2	2	20	4,095	Missing	1	1	Sensorineural, cause undetermined
736	74	1	2	6	9,453	10,521	2	2	Cochlear otosclerosis
796	90	2	1	16	2,525	1998	1	2	Sensorineural, cause undetermined
814	60	1	2	22	11,694	Missing	2	2	SN vicodin
820	72	1	2	18	9,621	13,374	2	2	Hereditary progressive
846	87	2	2	16	3,230	Ossified	1	2	Hereditary progressive, ostomy in scala tympani
775	76	2	2	22	2,244	implant	1	1?	Hereditary. Scala vest. ostomy.
									Electrode ruptured Reissner’s memb.

hTB = human temporal bone; M = male; F = female; Sp Gang Af Ear = spiral ganglion neuron count in the ipsilateral implanted ear for which data is entered on this line (some were bilaterally implanted); Sp Gang Non-af ear = spiral ganglion neuron count in the contralateral ear for which data is entered on this line; Ostomy = evidence of a cochleostomy insertion was found via temporal bone histological examination, as defined in the methods; SV Fib = stria vascularis fibrosis; missing indicates that the contralateral hTB was either not received or the modiolus was destroyed so that count could not be determined (e.g., transotic tumor removal, etc.)