Case Report

A Rare Stapes Abnormality

Table 1

Classification of congenital ossicular malformations (adapted from Teunissen and Cremers [10]).

Class IIsolated stapes footplate fixation
Class IIStapes fixation in combination with a congenital anomaly of the ossicular chain
Class IIIAnomalies of the ossicular chain and mobile stapes footplate
Class IVWith aplasia or severe dysplasia of the oval window or round window