Fallopian canal dehiscence: can it be pridicted

Abstract

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 modifi ed radical mastoidectomy as primary procedure between Jan. 2003 to Dec. 2004. The site of dehiscence and associated pre-operative and per-operative fi ndings were noted. Our results showed the incidence of fallopian canal dehiscence among cases undergoing radical and modifi ed radical mastoidectomy was 82/1000 per year. Around 66.6% dehiscence was located in tympanic segment. The preoperative factors signifi cantly associated with the fallopian canal dehiscence (p< 0.05) were Aural polyp, Extra-cranial complications, Cholesteatoma and Facial palsy. Per-operative fi ndings were Cholesteatoma, All ossicles necrosed except stapes footplate and Lateral semicircular canal fi stula.

The intra‐operative incidence of Fallopian canal dehiscence during surgery for cholesteatoma: a prospective case–control study and review of the literature

“…Thirdly, in one paper, the cases were not all assessed for FCD by the same surgeon, thus making the results susceptible to interobserver variation and bias. Fourthly, the largest reported incidence of 45.5% was by Jaswal et al . in a prospective review of 146 patients with chronic otitis media, of which only 11 had cholesteatoma.…”

“…The location of dehiscence was reported in all reviewed papers. In most, the tympanic portion is quoted as the most common with an incidence of >80% . A difference in the incidence rate between paediatric and adult populations has been noted.…”

“…The cited intra-operative incidence of FCD found at the time of cholesteatoma surgery varies widely and ranges from 8.9% to 45.5% (1994-2013) [5][6][7][8][9][10][11][12][13][14][15][16][17][18] (see Table 4). There are possible explanations for this variation.…”

“…In most, the tympanic portion is quoted as the most common with an incidence of >80%. [5][6][7][8][9][10][11][12][13][14][15][16][17][18] A difference in the incidence rate between paediatric and adult populations has been noted. In a retrospective review of 310 patients comprising 273 adults and 37 children, Shinnabe et al 6 found that FCD was more likely to be present in adults (P < 0.05).…”

Cautionary High-resolution Computed Tomography Findings for the Presence of Facial Canal Dehiscence in Patients with Cholesteatoma

“…Furthermore, FCD has been considered to be a negative prognostic factor for surgical outcome in COM surgery [16]. In this regard, highresolution computed tomography (HRCT) of the temporal bone provides valuable data since it can determine the cholesteatoma tissue and its extent, and assess the ossicles, facial canal, tegmen, PWEAC, bony plate over the sigmoid sinus and jugular vein, carotid canal, and inner ear structures [17][18][19]. Low-lying dura or anteriorly located sigmoid sinuses, which are considered important in mastoid surgery, can also be visualized preoperatively via HRCT scanning.…”