Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124
External Auditory Canal
A 35-year-old man presenting with otalgia, otorrhea, and mild conductive hearing loss. Ax , axial; Cor , coronal; NCCT, noncontrast computed tomography.
A patient with bilateral chronically draining ears. Ax , axial; Cor , coronal; NCCT, noncontrast computed tomography.
A 30-year-old patient with narrowing of the external canals bilaterally. Ax , axial; Cor , coronal; NCCT, noncontrast computed tomography.
A patient with a mass in the right ear canal covered by skin. Ax , axial; Cor , coronal; NCCT, noncontrast computed tomography.
An elderly diabetic patient with pain and a draining ear who now has facial paralysis. Ax , axial.
A 34-year-old man presenting with a fluctuant periauricular mass. CE, contrast-enhanced; CT, computed tomography; Cor , coronal; Sag , sagittal.
DESCRIPTION OF FINDINGS
-
Case A: Coronal and axial CT of the right temporal bone reveals soft tissue density in the right external auditory canal (EAC), resulting in bony remodeling and erosive changes.
-
Case B: Axial and coronal noncontrast (NC) CT images reveal soft tissue density in both EACs, resulting in bony remodeling but no erosive changes.
-
Case C: Axial and coronal NCCT images demonstrate broad-based ossific masses along the walls of the bony external canals bilaterally.
-
Case D: Axial and coronal NCCT images demonstrate a calcific density projecting from the posterior wall of the right EAC, without an associated soft tissue mass or erosive bony changes.
-
Case E: Axial T1-weighted images of the temporal bone before and after the administration of contrast reveal diffuse enhancement in the EAC extending into the bone and soft tissue inferior to the temporal bone, with associated obliteration of the involved fat planes.
-
Case F: Contrast-enhanced CT of the neck demonstrates a cystic rim-enhancing mass at the angle of the mandible. A contrast-enhanced CT magnified image of the left EAC reveals communication with the EAC floor.
Diagnosis
Case A
EAC cholesteatoma (although SCC could have an identical appearance)
Case B
Keratosis obturans
Case C
Bilateral EAC exostoses
You're Reading a Preview
Become a Clinical Tree membership for Full access and enjoy Unlimited articles
If you are a member. Log in here
