추체첨부 진주종에서의 내시경 사용을 접목한 중두개와 접근법의 유용성

Usefulness of middle cranial fossa approach with endoscopeassisted technique in petrous apex cholesteatoma

The endoscope has clear advantages over the microscope for visualization and instrumentation in the hidden regions, thus the use of endoscope has led to new treatment options in field of otology. Although approach to petrous apex (PA) creates difficulty in treatment, recent progresses in endoscopic surgery, using image guided system, allow removal of the PA cholesteatoma by endoscopically. Endoscopes can be used as an adjunctive tool when the lesion extends around the cochlea, the labyrinth and the internal auditory canal. Here, we report 2 cases of PA cholesteatoma that was treated by middle cranial fossa approach with endoscopic assisted technique and discuss about the usefulness of endoscopic assisted technique to PA cholesteatoma.