RT Journal Article
SR Electronic
T1 High-Resolution CT Findings in Children with a Normal Pinna or Grade I Microtia and Unilateral Mild Stenosis of the External Auditory Canal
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
SP 176
OP 180
DO 10.3174/ajnr.A4067
VO 36
IS 1
A1 Jacob, R.
A1 Gupta, S.
A1 Isaacson, B.
A1 Kutz, J.W.
A1 Roland, P.
A1 Xi, Y.
A1 Booth, T.N.
YR 2015
UL http://www.ajnr.org/content/36/1/176.abstract
AB SUMMARY: A subset of patients presents with unilateral conductive hearing loss, a normal pinna or grade I microtia, and mild external auditory canal stenosis. The physical findings of microtia and a small external canal are commonly absent or subtle in this group of patients, who are being commonly referred for imaging to evaluate isolated conductive hearing loss. We present a case series of patients with unilateral conductive hearing loss and characteristic ossicular abnormalities, commonly anterior fixation of the malleus. All patients had a significantly increased distance from the cochlear promontory to the handle of the malleus and an abnormal incudostapedial angle, indicative of an abnormal ossicular position and/or morphology. Successful surgical reconstruction of the ossicular chain was attempted and accomplished in 3 patients. CHLconductive hearing lossEACexternal auditory canalHRCThigh-resolution CT