DanyC submitted, created time 10 months 1 hour (www.sciencenews.org)

A new study suggests that these out-of-the-blue cancers may arise from nonpolyp growths. Such tissues are less conspicuous than polyps, but the new data suggest that they occur with some regularity and might be more dangerous than polyps. While polyps outnumbered nonpolyp growths, lab analyses showed that the nonpolyp kind was at least five times as likely to be cancerous.

Keywords: cancer colorectal cancer colon polyps