Thickened, white, leathery-looking spots on the inside of the mouth that can develop into oral cancer are called?

• A. Leukoplakia
• B. Tar
• C. Carbon monoxide
• D. Smokeless tobacco

Answer: (A)

White, thickened, leathery patches inside the mouth are called leukoplakia. This term describes precancerous white patches that arise from irritation of the mouth’s lining, often linked to tobacco use (including smokeless tobacco) and sometimes alcohol. Leukoplakia can, in some cases, progress to oral cancer, so patches like these should be evaluated by a clinician and potentially biopsied for a definitive diagnosis. The other options aren’t medical terms for this lesion: tar is a residue from tobacco smoke, carbon monoxide is a toxic gas produced by burning tobacco, and smokeless tobacco is a product that can irritate the mouth but isn’t the name of the condition.