More details
Hide details
King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
A - Research concept and design; B - Collection and/or assembly of data; C - Data analysis and interpretation; D - Writing the article; E - Critical revision of the article; F - Final approval of article;
Publication date: 2018-12-31
Corresponding author
Ahmad A. Alanazi   

Ahmad A. Alanazi, College of Applied Medical Sciences, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia. Email:
J Hear Sci 2018;8(4):51-55
There is an unknown relationship between hearing loss, vestibular disorders, and mega cisterna magna. The purpose of this case report is to describe, for the first time, hearing and vestibular examinations and rehabilitation for an older adult with mega cisterna magna.

Case Report:
This study presents the case of a 54-year-old male who complained of being hard of hearing (bilaterally), tinnitus, and dizzy spells. He had a history of working in noisy environments but no familial history of hearing loss. Several audiological and vestibular tests and magnetic resonance imaging (MRI) were administered. The subject was counseled about hearing aids and fitted with a ‘bilateral contralateral routing of signal’ (BiCROS) amplification system to overcome his hearing difficulties.

Mega cisterna magna can be either silent and cause no symptoms, or produce symptoms such as hearing loss, tinnitus, and dizziness. Aging and noise exposure are major causes of hearing loss and tinnitus. Further research is needed to determine the audiological and vestibular symptoms of a larger sample of patients with mega cisterna magna.

Tao G, Yew DT, Gu T, Liu S, Ma Z, Zhan X, Cheng L, Li C. Sexrelated differences in the anteroposterior diameter of the foetal cisterna magna. Clin Radiol, 2008; 63(9): 1015–8.
Ek S, Anadakumar C, Wong YC, Chau TM, Gole LA, Malarvishy G. Enlargement of cisterna magna as an indicator of chromosomal abnormalities in a low-risk Asian population. J Perinat Med, 1998; 26(4): 325–7.
Haimovici JA, Doubilet PM, Benson CB, Frates MC. Clinical significance of isolated enlargement of the cisterna magna (>10 mm) on prenatal sonography. J Ultrasound Med, 1997; 16(11): 731–4.
Pilu G, Falco P, Perola A, et al. Ultrasound evaluation of the fetal neural axis. In: Callen PW, editor. Ultrasonography in Obstetrics and Gynecology, 5th ed. Philadelphia, PA: WB Saunders; 2008; p. 363–91.
Robinson AJ, Goldstein R. The cisterna magna septa: vestigial remnants of Blake’s pouch and a potential new marker for normal development of the rhombencephalon. J Ultrasound Med, 2007; 26(1): 83–5.
Steiger RM, Porto M, Lagrew DC, Randall R. Biometry of the fetal cisterna magna: estimates of the ability to detect trisomy 18. Ultrasound Obstet Gynecol, 1995; 5(6): 383–90.
Bosemani T, Orman G, Boltshauser E, Tekes A, Huisman TAGM, Poretti A. Congenital abnormalities of the posterior fossa. Radiographics, 2015; 35: 200–20.
Ferentinos PP, Kontaxakis VP, Havaki-Kontaxaki BJ, Paplos KG, Pappa DA, Soldatos CR. Refractory psychosis and prominent cognitive deficits in a patient with mega-cisterna magna. Prog in Neuropsychopharmacol, 2007; 31: 561–3.
Yildiz H, Yazici Z, Hakyemez B, Erdogan C, Parlak M. Evaluation of CSF flow patterns of posterior fossa cystic malformations using CSF flow MR imaging. Neuroradiology, 2006; 48(9): 595–605.
Zimmer EZ, Lowenstein L, Bronshtein M, Goldsher D, AharonPeretz J. Clinical significance of isolated mega cisterna magna. Arch Gynecol Obstet, 2007; 276(5): 487–90.
Long A, Moran P, Robson S. Outcome of fetal cerebral posterior fossa anomalies. Prenat Diagn, 2006; 26(8): 707–10.
Kumar S, Sur S, Singh A. Mega cisterna magna associated with recurrent catatonia: a case report. Biol Psychiatry, 2011; 70(4): e19.
Taylor B. Contralateral routing of the signal amplification strategies. Semin Hear, 2010, 31(4): 378–92.
Heard AJ, Urato AC. The isolated mildly enlarged cisterna magna in the third trimester: much ado about nothing? J Ultrasound Med, 2011; 30(5): 591–3.
Yar M, Syed RA, Abou Al-Seoud MM. Mega cisterna magna diagnostic dilemma. Arch Dis Child, 2012; 97(Suppl 2): A302.
Rabinowitz PM, Galusha D, Slade MD, Dixon-Ernst C, Sircar KD, Dobie RA. Audiogram notches in noise-exposed workers. Ear Hear, 2006; 27(6): 742–50.
National Institute on Deafness and Other Communication Disorders. Tinnitus. 2017; [accessed 25 November 2018].
Gates GA, Mills JH. Presbycusis. Lancet, 2005; 366: 1111–20.
Yoon YS, Shin Y, Gho JS, Fu QJ. Bimodal benefit depends on the performance difference between a cochlear implant and a hearing aid. Cochlear Implants Int, 2015; 16(3): 159–67.
Hayes D. A practice guide to CROS and BiCROS. Audiol Online 2006; [accessed 9 January 2019].
Oeding K, Valente, M. Sentence recognition in noise and perceived benefit of noise reduction on the receiver and transmitter sides of a BICROS hearing aid. J Am Acad Audiol, 2013; 24(10): 980–91.
Journals System - logo
Scroll to top