A 54-year-old woman who regularly chewed loose-leaf tobacco presented with swelling, soreness, and an indurated lesion in the floor of the mouth. A biopsy confirmed squamous-cell carcinoma.

中文翻译：

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口腔鳞状细胞癌

一名54岁的女性，经常咀嚼散叶烟草，口红肿胀，酸痛和硬结。活检证实为鳞状细胞癌。