Defects of facial nerve canal according to a character and localisation of lesions in middle ear
Hydzik-Sobocińska, K.; Wiatr, M.; Baran, Z.; Składzień, J.; Tomik, J.; Morawska, A.; Przeklasa, R.
Przeglad Lekarski 66(11): 930-932
2009
ISSN/ISBN: 0033-2240 PMID: 20297631 Document Number: 634296
The aim of this study is the assessment the occurence of facial nerve canal (Fallopian canal) dehiscence in patients operated due to chronic medial otitis (depending on the location and type of inflammatory lesions) and in patients operated due to otosclerosis. Facial nerve paresis in patients with dehiscence found during surgery was also assessed. The study group consisted of 456 patients operated at the Department of Otolaryngology at the University Hospital in Krakow, 359 due to chronic otitis media and 97 due to otosclerosis. Facial nerve canal dehiscence was found during surgery in 26 patients (6% of operated patients) more frequently in men. In most cases (54%) dehiscence was observed in patients with chronic medial otitis with cholesteatoma (27% with choleseatoma and 27% with cholestatoma and granulation), and equally (23% each) dehiscences were observed in patients with granulation and even in patients with otosclerosis and chronic simple otitis media. In over than half (54%) of patients with dehiscence inflammatory lesions involved all the middle ear spaces, in 15% the tympanic cavity, attic and antrum while in 4% of patients inflammatory lesions were limited to the tympanic cavity, attic or antrum. The facial canal nerve dehiscence is observed in majority in patients with cholestatoma and granulation, especially in tympanic region. In some cases its coexistence with circuit canals dehiscence.