[Failure in mastoidectomy with posterior canal wall preservation and tympanoplasty case analysis]

Preservation of the posterior canal wall in mastoidectomy is essential for rebuilding normal tympanum and conductive structures, and has been widely recommended. However, controversies remain about the technique due to its complications and diverse results reported. This paper analysed the causes of four failed cases in detail and proposed measure to reduce morbidities and promote success. The review includes case selection, operation staging, surgical techniques and lesion removal etc.