ABSTRACT
A large vestibular aqueduct, an isolated anomaly of temporal bone, is relatively rare and its association with sensorinerual hearing loss in childhood is known as the enlarged vestibular aqueduct syndrome. Using MRI, we found enlarged endolymphatic ducts and sacs in four ears of our two patients. Signal intensity of enlarged endolymphatic sac that is detected higher than that of CSF in Fluid Attenuated Inversion Recovery (FLAIR) image may indicate poor prognisis with respect to bone conduction threshold in pure tone audiogram.
Subject(s)
Humans , Bone Conduction , Ear , Endolymphatic Duct , Endolymphatic Sac , Hearing Loss , Magnetic Resonance Imaging , Temporal Bone , Vestibular AqueductABSTRACT
Glomus tympanicum has to be considered to differentiate the etiology of middle ear mass with pulsatile tinnitus. MRI helps to differentiate the mass. Angiography helps to identify its feeding vessels and to embolize to reduce bleeding on operation. When the mass is not focally localized, tympanotomy combinded with mastoidectomy approach via posterior auricular incision is helpful to remove the mass completely.