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(A) Frequency of 1p loss in original meningioma that relapsed, nonrecurrent meningioma, and recurrences. The total numbers of evaluated tumors are shown. (B) Frequency of 1p loss in WHO grades I, II, and III. The total numbers of evaluated tumors are shown. (C) The Kaplan–Meier curves of recurrence-free survival. Curves are shown for the absence and the presence of 1p loss (n = 40 and 19, respectively; P = .020). Six recurrent events are shown.
