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d address the emergence of EAS benefit, binaural cue sensitivity, and the role of EAS experience in children and adults. Pneumatoceles of the temporal bone are rare entities. A symptomatic external auditory canal pneumatocele repaired endoscopically is demonstrated. A 79-year-old man presented with fluctuating hearing loss and difficulty wearing in-ear hearing aids. The patient had two previous tube insertions which both failed within days. Examination of the left ear revealed a cyst filling the superior aspect of the lateral canal and