Dislocation of the incus into the external auditory canal after mountain-biking accident

We report a rare case of incus dislocation to the external auditory canal a fter a mountain-biking accident. Otoscopy showed ossicular protrusion in th e upper part of the left external auditory canal. CT indicated the disappea rance of the incus, and an incus-like bone was found in the left external a uditory canal. There was another bony and board-like structure in the attic . During the surgery, a square-shaped bony plate (1 x 1 cm) was found in th e attic. It was determined that the bony plate had fallen from the tegmen o f the attic. The fracture line in the posterosuperior auditory canal extend ing to the fossa incudis was identified. According to these findings, it wa s considered that the incus was pushed into the external auditory canal by the impact of skull injury through the fractured posterosuperior auditory c anal, which opened widely enough for incus dislocation. Copyright (C) 2001 S. Karger AG, Basel.