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The Ni Classification 2019. Classification of vocal cord leukoplakia according to IPCL patterns. (A1-3) Type I IPCL pattern; (B1-3) type II IPCL pattern; (C1-3) type III IPCL pattern; (D1-3) type IV IPCL pattern; (E1-3) type V IPCL pattern; and (F1-3) type VI IPCL pattern. This figure is licensed by John Wiley and Sons. IPCL, intraepithelial papillary capillary loop.
