A positive family history of cancer or lifestyle factors may not explain the high incidence of early-onset colorectal cancer in India
2014
SUMMARY Aim: Colorectal cancer (CRC) patients from developing countries such as India exhibit distinct clinico-pathological characteristics including an early age of onset and predominant tumor localization in the rectum. However, the reason(s) for increased occurrence among the young is not clear. Materials & methods: In the current study, we performed a comparative analysis of several epidemiological features in early and late-onset CRC patients from India including association with familial syndromes, diet and lifestyle habits. Results: Surprisingly, there was no significant association of any epidemiological variable with early-onset CRC. Conclusion: Perhaps low penetrance syndromes and/or other genetic causes may be responsible for an early age of onset among Indian CRC patients.
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