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Selection of Surgical Approach for Trigonal Meningiomas in Consideration of Visual Outcome.

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OBJECTIVES We report the surgical outcome of trigonal meningiomas through 3 different approaches with attention to visual outcomes. METHODS Between 1994 and 2017, 23 patients underwent resection of trigonal meningiomas.… Click to show full abstract

OBJECTIVES We report the surgical outcome of trigonal meningiomas through 3 different approaches with attention to visual outcomes. METHODS Between 1994 and 2017, 23 patients underwent resection of trigonal meningiomas. We performed tumor removal using 3 different surgical approaches through the superior parietal lobule, middle temporal gyrus (MTG), and modified MTG. The patients were retrospectively identified, and surgical results including visual outcome were analyzed. RESULTS Twenty-three patients with a mean age of 45 years formed the study group. The most common symptom and sign were headache (N = 14, 60.9%) and visual disturbance (N = 6, 26.1%). All patients underwent surgical resection, 6 via a translateral approach through MTG, 8 via a translateral approach through modified MTG, and 9 via a transparietal approach through the superior parietal lobule (SPL). Gross total resection was achieved in all patients. We found that visual preservation rate was 25% (1/4) in the MTG group, 62.5% (5/8) in the modified MTG group, and 100% (7/7) in the SPL group, respectively (P = 0.044). Permanent complication rate was 50% (3/6) in the MTG group, 50% (n = 4/8) in the modified MTG group, and 11.1% (n = 1/9) in the SPL group. CONCLUSIONS The superior parietal lobule approach is a safe and applicable procedure with a great visual preservation and an acceptable risk of morbidity for trigonal meningiomas when there is a chance of visual recovery or preservation.

Keywords: visual outcome; group; modified mtg; trigonal meningiomas; approach

Journal Title: World neurosurgery
Year Published: 2018

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