Serial MR imaging studies in enlarged endolymphatic duct and sac syndrome.
Large vestibular aqueduct syndrome (LVAS) is a congenital disorder characterized by progressive or fluctuating sensorineural hearing loss of unknown etiology. Serial MR examinations were performed before and after the development of hearing loss in two patients with LVAS. The signal and volume of the enlarged endolymphatic sac (EES) vary even in ears with stable hearing. In ears with fluctuating hearing, changes in EES signals were observed in only one of two patients. The finding that the EES volume and signal intensity vary dynamically independently of hearing is important for future research into the pathophysiology of hearing loss in this syndrome.
Naganawa
Shinji
S
Department of Radiology, Nagoya University School of Medicine, 65 Tsurumai-cho, Shouwa-ku, Nagoya 466-8550, Japan. naganawa@med.nagoya-u.ac.jp
Koshikawa
Tokiko
T
Fukatsu
Hiroshi
H
Ishigaki
Takeo
T
Nakashima
Tsutomu
T
D000328:Adult; D002648:Child; D018450:Disease Progression; D004712:Endolymphatic Sac / Q000002:abnormalities* / Q000000981:diagnostic imaging*; D005260:Female; D006319:Hearing Loss, Sensorineural / Q000175:diagnosis / Q000209:etiology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D011859:Radiography; D013577:Syndrome