A 15-year-old girl was presented with a two-week history of facial swelling that is worse in the morning and gradually improves throughout the day. She has also noticed some swelling of her ankles in the last three days and that her urine has become quite frothy. She has no medical history and is not taking any medications. On examination, the girl was slim, comfortable, and afebrile. Her BP was 110/65 mmHg.
There was mild periorbital swelling and pitting edema to the mid-shins. The examination was otherwise unremarkable. Investigations show: Urine dipstick proteinuria 4+. Negative for haematuria, nitrites, and leucocytes Albumin: 19 g/dL Sodium: 135 mmol/L, Potassium: 4.1 mmol/L, Urea: 4 mmol/L, Creatinine: 52μ mol/L 24-hour urine protein: 5 g US renal tract: Two unobstructed, normal- sized (10 cm) kidneys What is the diagnosis and the suggested first line of treatment? *This patient…