PMC5960851_01
(a) CT imaging (horizontal plane) of CA (asterisk) in the right external auditory canal with no bone invasion. (b) A control CT scan was performed 1 year after surgery showing no recurrence.
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The CT scan showed a soft tissue density mass protruding from the postero-inferior wall of the entrance to the external auditory canal and obstructing the canal with no invasion of other tissues (Figure 1a). The patient has been tumor free for 12 months postoperatively (Figure 1b), with no hearing loss or symptoms of external otitis in this period.
(a) The circumscribed but unencapsulated tumor (inset: H&E, 20x) of the ceruminous gland is composed of two cell populations: epithelial cells in the inner layer and myoepithelial cells in the outer layer (H&E, 200x). (b) Glandular structures show ceruminous secretion in the luminal cells (H&E, 400x). (c) Glandular structures are separated by fibrous connective tissue (H&E, 200x).
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All of the microscopic features were indicative of CA (Figure 2) and the surgical margin was clear.