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Follow-up tests may help show when colon cancer has returned after surgery, a new study finds. The study included 1,200 people who had received colon cancer surgery. They were randomly divided into 4 groups. One group received regular CT scans. Another other group got regular tests for a blood protein, called CEA. At abnormal levels, this protein can be a sign of cancer. A third group got both tests. A fourth group had no special follow-up. Researchers kept track of people for an average of 4.4 years. In that time, 2.3% of those in the group who got no special follow-up had a second surgery because of a return of their colon cancer. Similar surgeries were done in 6.7% of the CEA group and 8% of the CT group. The rate of second surgery was 6.6% in the group that got both tests.

“Brain training” may help older adults think clearly, but may not help memory, a new study shows. The study included more than 2,800 people, average age 73. They were randomly divided into 4 groups. Three groups received brain training. The memory group learned strategies to remember words, lists and story details. The reasoning group learned how to solve problems that follow patterns. A third group used a computer program that trained them to find and process visual information quickly. The fourth got no training. People had improvements in these specific skills right after they were trained. Ten years later, researchers were able to track down about half of them and test them again. About 60% of the trained groups and 50% of the untrained group reported being at least as able to handle daily tasks as they were 10 years before.

Assaults on children at school lead to about 88,000 emergency room visits each year, a new study estimates. Very few of the assaults involved guns or required a hospital stay. About 40% of the injuries were bruises and scratches. The study was based on a survey of 66 hospitals. It covered the years 2001 through 2008. Researchers estimated nationwide totals based on this limited sample. An estimated 7 million ER trips occurred during those years because of injuries in schools. About 92,000 visits each year resulted from deliberate injuries. Nearly all (96%) were assaults rather than self-injury. Middle-school kids, non-whites and boys were more likely than others to be assaulted at school. Researchers called for better prevention strategies. Injuries that occurred outside of school were more likely to be severe. About 3% involved guns, compared with 0.08% of injuries at school.