An eight-year-old Caucasian girl is referred for further evaluation after a routine school health examination showed a blood pressure of 150/90 mmHg, even after adequate rest. She is completely asymptomatic.

She has no medical history of clinical significance. She is not on any medications, including over-the-counter drugs or herbal supplements. Her family history is unremarkable. Her growth and development are normal. All immunizations are up-to-date. Her nutritional status is good.

A complete blood count is within normal parameters.