Long-term outcomes
Disease recurrence, cartilage displacement, perforation and re-contraction/re-contraction pocket formation, etc. were measured as long-term postoperative results one year after operation (Figure 6). Graft dislocation in osteoplasty occurred in this patient. There was no significant difference in the long-term results measured one year after operation between the two groups.
DISCUSSION
Attic cholesteatoma from Prussian cavity, through superior membrane and superior sinus to mastoid process. Among them, the endoscope with curette has a wider field of operation for attic cholesteatoma extending to maxillary sinus. Cholesteatoma undergoing mastoidectomy extends to mastoid cavity, so ventilation should be ensured during the operation, so that the lesion can be completely removed and the possibility of recurrence of attic cholesteatoma can be completely solved.
Extent of surgical exposure
The main purpose of cholesteatoma surgery is to reveal the new systematicness of the key parts of attic.7 The exposure degree of each case in middle and middle ear surgery can be measured by a special grading system. MESVI, as the only grading system of middle ear surgical exposure, is the main content of our research. The median MESVI of microscopic approach is not as good as that of endoscopic approach. The median MESVI of the microscopic approach is lower than that of the endoscopic approach under an approximately equal exposure area. At this time, the perspective of endoscopic surgery was broadened. The angle endoscope with appropriate instruments can be used to check the corner of the upper membrane cavity, which can better and more completely solve the disease without sacrificing extra bones.