q7 - okt3

[ArchivalUser]

Which of the following locations is most likely for the development of carcinoma in a 32-year-old baseball player
who has chewed tobacco for 15 years?


A. Floor of the mouth

B. Lower lip

C. Tongue

D. Tonsils

E. Upper lip

[ArchivalUser]

ccc

[ArchivalUser]

how about A

[ArchivalUser]

The correct answer is B. Oral cancer is most strongly related to tobacco chewing, with weaker associations with
cigarette smoking, pipe smoking, and alcohol use. Unfortunately, many teenagers believe that chewing tobacco
is "harmless" because it does not cause lung cancer, and the case illustrated in the question is unfortunately
not uncommon. Oral cancers tend to occur on the lower lip (40%; choice B), tongue (20%; choice C), floor of
the mouth (15%; choice A), with other oral sites (choices D and E) being less common. They are usually
squamous cell carcinomas and unlike their skin counterparts, frequently cause both extensive morbidity and
mortality.