Clinical History.—This 19-month-old boy was in good health until age 11 months. At that time, pink urine was noted by his mother at time of diaper change. There were no clots of blood in his diapers. The hematuria developed shortly after he received immunizations for measles, rubella, and mumps. The hematuria was not associated with fever, sweating, or chills, nor did the child ever have a kidney or bladder infection.
Physical Examination.—The patient appeared to be a normal boy with bilaterally descended testes. The chest showed the lungs to be clear to percussion and auscultation. The cardiovascular system was within normal limits. The abdomen was soft and nontender without hepatosplenomegaly or renal masses. There were no renal bruits heard. Vital signs showed the blood pressure, by palpation, with a systolic of 80, pulse rate of 100 beats per minute, and respiratory rate of 20 per minute.