A Case of Congenital Bifurcation of the Labyrinthine Segment of Facial Nerve
1
조회
0
다운로드
0
인용
0
참고문헌
초록
The most common anomaly of facial nerve is bony dehiscence of the fallopian canal, being present in approximately 55% of the population. Abnormal courses of facial nerve are reported commonly. Of the malformation of the facial nerve, bifurcation of its intratemporal portion has been rarely reported, in which one or more segments of the facial nerve splits. Nine years-old girl (right-handed) came to our outpatient clinic for left hearing loss, which was incidentally found by herself. Audiologic and radiologic work-up demonstrated unilateral sensorineural hearing loss, which was resulted from the narrow bony cochlear nerve canal, and incidentally found the bifurcation of the labyrinthine segment of ipsilateral facial nerve. We described characteristic findings on the computed tomogram of this anomaly and discussed it. It is important to identify the anomalous facial nerve in the patients undergoing evaluation for congenital hearing loss.
Abstract
The most common anomaly of facial nerve is bony dehiscence of the fallopian canal, being present in approximately 55% of the population. Abnormal courses of facial nerve are reported commonly. Of the malformation of the facial nerve, bifurcation of its intratemporal portion has been rarely reported, in which one or more segments of the facial nerve splits. Nine years-old girl (right-handed) came to our outpatient clinic for left hearing loss, which was incidentally found by herself. Audiologic and radiologic work-up demonstrated unilateral sensorineural hearing loss, which was resulted from the narrow bony cochlear nerve canal, and incidentally found the bifurcation of the labyrinthine segment of ipsilateral facial nerve. We described characteristic findings on the computed tomogram of this anomaly and discussed it. It is important to identify the anomalous facial nerve in the patients undergoing evaluation for congenital hearing loss.
참고문헌 (15)
- Romo LV, "Anomalous facial nerve canal with cochlear malformations", AJNR Am J Neuroradiol, 22(5), pp.838~844 (2001)
- Glastonbury CM, "Congenital bifurcation of the intratemporal facial nerve", AJNR Am J Neuroradiol, 24(7), pp.1334~1337 (2003)
- Celin SE, "Facial nerve bifurcation within the internal auditory canal", Otolaryngol Head Neck Surg, 104(3), pp.389~393 (1991)
- Nager GT, "Pathology of the ear & temporal bone", pp.147~164 (1993), Lippincott Williams & Wilkins
- Baxter A, "Dehiscence of the fallopian canal", J Laryngol Otol, 85(6), pp.587~594 (1971)
- Moreano EH, "Prevalence of facial canal dehiscence and of persistent stapedial artery in the human middle ear: a report of 1000temporal bone", Laryngoscope, 104(3 Pt 1), pp.309~320 (1994)
- Jahrsdoerfer RA, "The facial nerve in congenital middle ear malformations", Laryngoscope, 91(8), pp.1217~1225 (1981)
- Jakkani RK, "Congenital duplication of mastoid segment of facial nerve: a rare case report", Indian J Radiol Imaging, 23(1), pp.35~37 (2013)
- 김상렬, "안면신경의 양측성 유양분절 이분화 1예", 대한이비인후-두경부외과학회지, 48(6), pp.804~806 (2005), 대한이비인후과학회
- Nager GT, "The facial canal: normal anatomy, variations and anomalies. II. Anatomical variations and anomalies involving the facial canal", Ann Otol Rhinol Laryngol Suppl, 97, pp.45~61 (1982)
- Tehrani SJT, "Facial canal bifurcation with inner ear anomalies in a case of Klippel-Feil syndrome: a case report", Int J Pediatr Otorhinolaryngol Extra, 8(2), pp.32~35 (2013)
- Jin A, "Variations in the labyrinthine segment of facial nerve canal revealed by high-resolution computed tomography", Auris Nasus Larynx, 45(2), pp.261~264 (2018)
- Som PM, "Current embryology of the temporal bone, Part II: the middle and external ears, the statoacoustic and facial nerves, and when things go developmentally wrong", Neurographics, 6, pp.332~349 (2016)
- Tahir E, "Bony cochlear nerve canal and internal auditory canal measures predict cochlear nerve status", J Laryngol Otol, 131(8), pp.676~683 (2017)
- Lim CH, "Bony cochlear nerve canal stenosis in pediatric unilateral sensorineural hearing loss", Int J Pediatr Otorhinolaryngol, 106, pp.72~74 (2018)