title: High-resolution CT findings in children with a normal pinna or grade I microtia and unilateral mild stenosis of the external auditory canal.
abstract: 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.
authors.affiliation: From the Departments of Radiology (R.J., Y.X., T.N.B.).
authors.forename: R
authors.initials: R
authors.lastname: Jacob
authors.affiliation: Otolaryngology (S.G., B.I., J.W.K., P.R.), Children's Medical Center of Dallas, University of Texas, Southwestern Medical Center, Dallas, Texas.
authors.forename: S
authors.initials: S
authors.lastname: Gupta
authors.affiliation: Otolaryngology (S.G., B.I., J.W.K., P.R.), Children's Medical Center of Dallas, University of Texas, Southwestern Medical Center, Dallas, Texas.
authors.forename: B
authors.initials: B
authors.lastname: Isaacson
authors.affiliation: Otolaryngology (S.G., B.I., J.W.K., P.R.), Children's Medical Center of Dallas, University of Texas, Southwestern Medical Center, Dallas, Texas.
authors.forename: J W
authors.initials: JW
authors.lastname: Kutz
authors.affiliation: Otolaryngology (S.G., B.I., J.W.K., P.R.), Children's Medical Center of Dallas, University of Texas, Southwestern Medical Center, Dallas, Texas.
authors.forename: P
authors.initials: P
authors.lastname: Roland
authors.affiliation: From the Departments of Radiology (R.J., Y.X., T.N.B.).
authors.forename: Y
authors.initials: Y
authors.lastname: Xi
authors.affiliation: From the Departments of Radiology (R.J., Y.X., T.N.B.) tim.booth@childrens.com.
authors.forename: T N
authors.initials: TN
authors.lastname: Booth
mesh_terms: D002648:Child; D065817:Congenital Microtia / Q000000981:diagnostic imaging*; D003251:Constriction, Pathologic; D054644:Ear Auricle / Q000000981:diagnostic imaging*; D004424:Ear Canal; D004427:Ear Diseases / Q000000981:diagnostic imaging; D004429:Ear Ossicles / Q000002:abnormalities; D005260:Female; D006314:Hearing Loss, Conductive / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D014057:Tomography, X-Ray Computed