有不少人在口腔粘膜上常出现一些色素斑,甚至在其表面形成了溃疡,以为是一般的口腔溃疡而不予重视。殊不知,口腔癌正是在这些慢性口腔粘膜病变的基础上发生的,可以认为这些病变具有癌前性质,虽非全部处于癌前阶段,但的确有些色素斑会发生癌变。故有人把口腔粘膜色素斑称为口腔癌 There are many people in the oral mucosa often appear some pigmented spots, and even formed on the surface of the ulcer that is a general oral ulcer and not attention. As everyone knows, oral cancer is in these chronic oral mucosal lesions based on the occurrence of these lesions can be considered pre-cancerous nature, although not all in the precancerous stage, but it does happen that some pigmentation cancer. So someone called the oral mucosa pigment spots as oral cancer