Iatrogenic temporal bone meningoencephalocele (MEC) through the defect site of tegmen can be occurred after the surgical procedure of mastoidectomy even though its clinical manifestations and prognosis are not well known till now. Six years ago, the p...
Iatrogenic temporal bone meningoencephalocele (MEC) through the defect site of tegmen can be occurred after the surgical procedure of mastoidectomy even though its clinical manifestations and prognosis are not well known till now. Six years ago, the patient underwent canal wall up mastoidectomy due to chronic otitis media and had a 5mm in diameter iatrogenic loss of dural plate without any direct dural injury during the surgery. Recurrence of chronic otitis media led him to take reoperation. He did not show any cranial nerve symptoms or signs but preoperative temporal bone computed tomogram demonstrated suspicious MEC in the mastoid cavity. Here, we report a case of asymptomatic but clinically important iatrogenic MEC.