Cochlear Neural Degeneration Without Hair Cell Loss in Two Patients with Aminoglycoside Ototoxicity

Abstract
The temporal bones of two young adults who developed auditory toxicity during or shortly after a course of aminoglycoside therapy were examined by using light microscopy. Although the organs of Corti were essentially normal, the total number of cochlear ganglion cells was about one-third lower than the number observed in comparable subjects with normal hearing.