Dysequilibrium in a 5-year-old child with intrameatal vascular loops bilaterally.
A 5 year-old boy was rather healthy until one month ago when loss of balance and muscle tone was noted by the parents. A battery of tests comprising electroencephalography, audiometry, caloric test and ocular vestibular evoked myogenic potential (oVEMP) test were performed, yet all tests showed normal responses. Conversely, cervical VEMP (cVEMP) test showed delayed responses bilaterally. MR imaging demonstrated bilaterally intrameatal vascular loops extending into both internal auditory canals. After a 3-month medication, delayed cVEMPs were resolved and returned to normal cVEMPs bilaterally, accompanied by subsidence of dysequilibrium.
Department of Otolaryngology, Far Eastern Memorial Hospital, Taipei, Taiwan.
Ming-Hsun
MH
Wen
Department of Otolaryngology, Far Eastern Memorial Hospital, Taipei, Taiwan.
Po-Wen
PW
Cheng
Department of Otolaryngology, National Taiwan University Hospital, Taipei, Taiwan. Electronic address: youngyh@ntu.edu.tw.
Yi-Ho
YH
Young
D001158:Arteries / Q000000981:diagnostic imaging*; D001299:Audiometry; D002150:Caloric Tests; D002531:Cerebellum / Q000098:blood supply*; D002675:Child, Preschool; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D018908:Muscle Weakness / Q000209:etiology; D004856:Postural Balance; D012678:Sensation Disorders / Q000209:etiology*; D015837:Vestibular Diseases / Q000150:complications / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D058585:Vestibular Evoked Myogenic Potentials
Anterior inferior cerebellar artery (AICA) loop; Cervical vestibular evoked myogenic potential; Imbalance; Ocular vestibular evoked myogenic potential