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. 2020 Aug 15;11:93. doi: 10.1186/s13244-020-00902-6

Fig. 13.

Fig. 13

A 65-year-old male patient, with external auditory canal hypoplasia and bilateral SNLH from birth. HRCT axial image shows a hypoplastic round window (arrow) and a small tympanic cavity (asterisk). This condition complicates anatomical orientation and surgical access to the basal turn (arrowhead)