[Retracted] Clinical Analysis of 85 Cases of External Auditory Canal Cholesteatoma Surgery under Specialized Endoscopy

Figure 1

CT images of the Shin stages of EACC. Note: (a) stage I: soft tissue shadow in the right external auditory canal, the lesion is confined to the external auditory canal without bone destruction; (b) stage II: soft tissue shadow in the left external auditory canal invades the tympanic membrane into the middle ear cavity and destroys the bone of the external auditory canal wall; (c) stage III: soft tissue shadow in the right external auditory canal, not only destroys the bone of the external auditory canal but further invades the small bone of the middle ear cavity and involves the mastoid.

(a)

(b)

(c)