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  • Title: Combined Endoscopic and Microscopic Surgery for Perilabyrinthine Lesions: Feasibility and Technique.
    Author: Wei X, Gao Z, Tian X, Zhao Y, Feng G.
    Journal: Otol Neurotol; 2019 Dec; 40(10):1306-1312. PubMed ID: 31634284.
    Abstract:
    OBJECTIVES: To determine the feasibility of endoscopic-assisted surgery for lesions involving the perilabyrinthine recesses, and develop and validate a technique for this kind of lesions that increases the possibility of preserving the labyrinth and cochlea. STUDY DESIGN: Observational study. SETTING: Referral center. CASES: Five patients who underwent endoscopy-assisted surgery for lateral skull base pathology involving the perilabyrinthine recesses between July 2010 and March 2016 were reviewed. INTERVENTIONS: Clinical data of the five patients were collected. MAIN OUTCOMES MEASURES: Hearing level and recurrence. RESULTS: Three of the five patients (three women, two men) had petrous bone cholesteatomas, one a facial neurofibroma, and one a petrous bone cholesterol granuloma. Complete excision with labyrinth and cochlea preservation was achieved using an endoscopic-assisted technique in all patients. Four had preoperative conductive hearing loss and one was totally deaf. In one patient, the postoperative air-bone gap was 30 dB lower than preoperatively levels, one stayed the same, and one was 30 dB because of closing of the external ear canal. After an average follow-up of 62.9 months, no patient had recurrence. CONCLUSIONS: Endoscope-assisted surgery is feasible for lesions involving the perilabyrinthine recesses and increases the likelihood to preserve the structure and function of labyrinth/cochlea, which may provide chances for artificial hearing devices implantation.
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