Paid

Clinical Roundup

Dysfunctional white blood cells linked to heightened melanoma risk

Mayo Clinic study has found that 8 million to 10 million Americans over age 40 have an overabundance of cloned white blood cells, or lymphocytes, that hamper their immune systems. Although many who have this condition—called monoclonal B-cell lymphocytosis—do not experience any symptoms, a recent study shows they may have an elevated risk for several health complications, including melanoma.