TY - JOUR 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. DO - 10.3174/ajnr.A4067 AU - R. Jacob AU - S. Gupta AU - B. Isaacson AU - J.W. Kutz, Jr AU - P. Roland AU - Y. Xi AU - T.N. Booth Y1 - 2014/08/14 UR - http://www.ajnr.org/content/early/2014/08/14/ajnr.A4067.abstract N2 - 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. Abbreviations CHLconductive hearing lossEACexternal auditory canalHRCThigh-resolution CT ER -