Hematuria in paediatrics

A 10 year-old boy presented to the pediatric clinic with gross hematuria, tea-colored urine dating from 4 days before consulting, mild pelvic abdominal pain, decreased appetite and history of 2 days of fever prior, no nausea, no vomiting. Upon reviewing the past medical history over the previous weeks: patient noted that 15 days prior to consulting, he complained of sore throat with enlarged tonsils, no antibiotic was taken. On physical exam, patient has a blood pressure of 115/79, bilateral flank abdominal tenderness, no edema.