General Medicine General df58d609 highest incidence in men over age 50 A 14-year-old boy develops nephrotic syndrome. A renal biopsy shows foot process fusion and no deposits on the membranes under electron microscopy. Which of the following is the most likely diagnosis? A mesangial proliferative glomerulonephritis B minimal change disease C focal glomerulosclerosis D membranous glomerulonephritis