(1) As a sophomore, a bout with mononucleosis and an injury limited his play to 29 games, in which he scored just three goals.(2) These white blood cells help fight viral infections, and an increased number of ‘atypical’ lymphocytes usually indicates current infection with mononucleosis .(3) The pharyngitis and flu-like symptoms are difficult to distinguish from mononucleosis in older patients.(4) The flu gave way to mononucleosis and finally chronic fatigue syndrome, which sidelined him for several months.(5) Common benign causes include adenoviral illness in children, mononucleosis , and some pharmaceuticals, and these can usually be identified with a careful history and examination.