Fallopian canal dehiscence: can it be pridicted.

The aim of the study is to give an idea about true incidence and most common location of fallopian canal dehiscence and to identify predictive factors associated with fallopian canal dehiscence based on preoperative and peroperative clinical correlates so as to facilitate preemptive prediction of the condition. The study design pertains to a prospective study. The setting of the study was tertiary referral hospital and a total of 146 patients underwent radical and modified radical mastoidectomy as primary procedure between Jan. 2003 to Dec. 2004. The site of dehiscence and associated pre-operative and per-operative findings were noted. Our results showed the incidence of fallopian canal dehiscence among cases undergoing radical and modified radical mastoidectomy was 82/1000 per year. Around 66.6% dehiscence was located in tympanic segment. The preoperative factors significantly associated with the fallopian canal dehiscence (p< 0.05) were Aural polyp, Extra-cranial complications, Cholesteatoma and Facial palsy. Per-operative findings were Cholesteatoma, All ossicles necrosed except stapes footplate and Lateral semicircular canal fistula.