From Science Daily: Researchers at the University Of South Florida Health Sciences Center have unlocked at least part of the mystery of how tumors flourish undetected by keeping their presence a secret from sentries of the body's immune system. “Flying beneath the radar” is how Nature Reviews Cancer labels the mechanism of tumors evading capture.
The tumor's activation of Stat3 (from the STAT family of proteins that regulates genes) secretes factors that inhibit the body's…
Source: http://www.transhumanism.com/news_comments.php?id=1097_0_2_0_C