KRAS mutations in lung carcinomas are more likely in which histology, smoker status, and race?

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Multiple Choice

KRAS mutations in lung carcinomas are more likely in which histology, smoker status, and race?

Explanation:
KRAS mutations in non-small cell lung cancer tend to occur most often with an adenocarcinoma histology and are strongly associated with tobacco exposure, with a higher frequency reported in Caucasian patients. This combination—adenocarcinoma, smokers, and caucasians—best matches the typical mutation pattern. KRAS is less common in squamous histology and in non-smokers, and race distribution is not centered on mixed or non-Caucasian populations, making the other options less consistent with the usual KRAS profile.

KRAS mutations in non-small cell lung cancer tend to occur most often with an adenocarcinoma histology and are strongly associated with tobacco exposure, with a higher frequency reported in Caucasian patients. This combination—adenocarcinoma, smokers, and caucasians—best matches the typical mutation pattern. KRAS is less common in squamous histology and in non-smokers, and race distribution is not centered on mixed or non-Caucasian populations, making the other options less consistent with the usual KRAS profile.

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