TRPC6 and focal segmental glomerulosclerosis: Over the past 10 years, nearly 30 TRPC6 variants have been reported in patients with FSGS of varying ages (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32).