In a 16-year-old pregnant female with high blood pressure and proteinuria, what is the most likely diagnosis?

In a 16-year-old pregnant female presenting with high blood pressure and proteinuria, the most likely diagnosis is pre-eclampsia. This condition is defined by the onset of hypertension and proteinuria after the 20th week of gestation, which fits the scenario described. Pre-eclampsia is a significant concern in pregnancy as it can lead to severe complications for both the mother and the fetus if not appropriately managed.

The presence of proteinuria along with elevated blood pressure distinguishes pre-eclampsia from gestational hypertension, which involves elevated blood pressure without proteinuria. Eclampsia would require the presence of seizures in addition to the characteristics of pre-eclampsia. HELLP Syndrome is a more severe manifestation of pre-eclampsia that involves hemolysis, elevated liver enzymes, and low platelet count, and typically presents later in pregnancy or postpartum.

Given the symptoms of high blood pressure and proteinuria in a young pregnant female, the underlying concern aligns closely with the criteria for pre-eclampsia. It's essential to monitor and manage this condition carefully to prevent further complications.