Metastisis happens earlier than previously thought

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SUMMARY

Recent research published in Science reveals that cancer spread occurs earlier than previously understood, with normal cells potentially transporting cancer to new sites before a tumor is even formed. This finding is particularly significant for breast cancer, as it explains why secondary tumors can develop long after initial treatment. Experts emphasize the importance of understanding cancer metastasis, as secondary cancers are responsible for the majority of cancer-related deaths. The discussion also highlights the specificity of secondary tumors, such as prostate cancer cells preferentially seeding in bone, raising critical questions about treatment strategies.

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Astronuc
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Cancer spread 'happens earlier'
http://news.bbc.co.uk/2/hi/health/7586444.stm
Apparently "normal" cells may carry cancer to new sites long before a tumour develops, lying dormant until key genes are activated, experts say.

US researchers say their findings, published in Science, could explain why some breast cancers lead to new tumours long after the disease is treated.

Secondary, or metastatic, cancers are responsible for the majority of deaths from the disease.

UK experts said it was essential to know more about how the cancer spreads.
Something to keep in mind as one ages, and the risk of cancer increases. Prevention is certainly much better than treatment.
 
Biology news on Phys.org
Another interesting point is that the secondary tumors are very specific: for example, prostate cancer cells will preferentially seed bone.

The discussion of this effect (among the MDs) is referred to as "the seed or the soil". As in, is this phenomenon due to the cell or to the environment. Yes, it may be both- but the question in that context revolves around treatment options, as opposed to basic science.
 

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