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. Author manuscript; available in PMC: 2020 Jan 24.

Published in final edited form as: Audiol Neurootol. 2019 Jan 24;23(6):326–334. doi: 10.1159/000495176

a: Mid-modiolar section of the left cochlea. The organ of Corti (OC) is present in all three turns of the cochlea. The spiral ganglion cell density (SPG) is reduced in the basal turn.

b Basal turn of the right cochlea. Both inner (IHC) and outer (OHC) hair cells are present. The cochlear neurons in the osseous spiral lamina (OSL) are intact. Note the mild loss of cellular elements within the spiral ligament (SL) and the normal stria vascularis (SV).

c Cribrose area seen in the mid-modiolar section of the right cochlea. There is deposition of eosinophilic amorphous extracellular material (EM) between the cochlear nerve fibers.

a: Mid-modiolar section of the left cochlea. The organ of Corti (OC) is present in all three turns of the cochlea. The spiral ganglion cell density (SPG) is reduced in the basal turn.

b Basal turn of the right cochlea. Both inner (IHC) and outer (OHC) hair cells are present. The cochlear neurons in the osseous spiral lamina (OSL) are intact. Note the mild loss of cellular elements within the spiral ligament (SL) and the normal stria vascularis (SV).

c Cribrose area seen in the mid-modiolar section of the right cochlea. There is deposition of eosinophilic amorphous extracellular material (EM) between the cochlear nerve fibers.