Then, on our Mayo Clinic Q&A segment, a look at lymphoma, a cancer of the lymphatic system, which is part of the body's germ-fighting network. Dr. Jose Villasboas Bisneto, Mayo Clinic hematologist, explains the various types of lymphoma and how they are treated.

And, many middle school students are at serious risk of cardiovascular disease or high cholesterol. We'll hear some concerning findings from a study led by Robert M. Siegel, MD, FAAP, Director of the Center for Better Health and Nutrition in the Heart Institute at Cincinnati Children's Hospital Medical Center.