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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
(A). Ulcerated incipient oral carcinoma. (B). Benign traumatic ulcer. The characteristics of this ulcer should be noted. Clean and homogeneous bottom, well-defined border, white peri-ulcerous halo.