Angela Guarnizo1, Juan Andrés Mejía2, Oscar Torres3. 1. Department of Radiology, Division of Neuroradiology, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, Colombia. apguarnizo@gmail.com. 2. Department of Radiology, Division of Interventional Neuroradiology, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, Colombia. 3. Department of Radiology, Division of Neuroradiology, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, Colombia.
Abstract
PURPOSE: To describe an anatomical variant that should be consider in patients with hearing loss. METHODS: An 8-year-old girl underwent to temporal bone computed tomography for the evaluation of bilateral conductive hearing loss and further assessment of possible enlarged vestibular aqueduct or high jugular bulb on brain magnetic resonance imaging (MRI). RESULTS: CT of temporal bone showed a cystic cavity with bony sclerotic margins extending from the right jugular foramen to the vestibular aqueduct. Bony dehiscence of the jugular foramen with the right carotid canal was also noted. On brain MRI, there was no evidence of enlargement of the endolymphatic duct and sac on T2 thin-section gradient echo sequence. Time of flight MR angiography did not show arterial flow in the cavity. Contrast enhanced MR venography confirmed the presence of a high right jugular bulb with a diverticulum extending into the vestibular aqueduct due to jugular bulb-vestibular aqueduct dehiscence. CONCLUSION: Knowledge of high jugular bulb-vestibular aqueduct dehiscence is important in the assessment of patients with otologic symptoms such as vertigo, tinnitus and hearing loss.
PURPOSE: To describe an anatomical variant that should be consider in patients with hearing loss. METHODS: An 8-year-old girl underwent to temporal bone computed tomography for the evaluation of bilateral conductive hearing loss and further assessment of possible enlarged vestibular aqueduct or high jugular bulb on brain magnetic resonance imaging (MRI). RESULTS: CT of temporal bone showed a cystic cavity with bony sclerotic margins extending from the right jugular foramen to the vestibular aqueduct. Bony dehiscence of the jugular foramen with the right carotid canal was also noted. On brain MRI, there was no evidence of enlargement of the endolymphatic duct and sac on T2 thin-section gradient echo sequence. Time of flight MR angiography did not show arterial flow in the cavity. Contrast enhanced MR venography confirmed the presence of a high right jugular bulb with a diverticulum extending into the vestibular aqueduct due to jugular bulb-vestibular aqueduct dehiscence. CONCLUSION: Knowledge of high jugular bulb-vestibular aqueduct dehiscence is important in the assessment of patients with otologic symptoms such as vertigo, tinnitus and hearing loss.
Authors: David R Friedmann; Jan Eubig; Leon S Winata; Bidyut K Pramanik; Saumil N Merchant; Anil K Lalwani Journal: Arch Otolaryngol Head Neck Surg Date: 2012-01
Authors: Colm Madden; Mark Halsted; Jareen Meinzen-Derr; Dianna Bardo; Mark Boston; Ellis Arjmand; Carla Nishimura; Tao Yang; Corning Benton; Vijay Das; Richard Smith; Daniel Choo; John Greinwald Journal: Arch Otolaryngol Head Neck Surg Date: 2007-02
Authors: T Okudera; Y P Huang; T Ohta; A Yokota; Y Nakamura; F Maehara; H Utsunomiya; K Uemura; H Fukasawa Journal: AJNR Am J Neuroradiol Date: 1994-11 Impact factor: 3.825