PLA2R1 and idiopathic membranous glomerulonephritis: The decision and timing of initiating specific treatment, in addition to anti-proteinuric treatment for patients with recurrent idiopathic membranous GN remains unknown, as many patients may have subclinical histological recurrence (particularly those with pre-transplant circulating anti-PLA2R antibody) or the proteinuria may be attributed to other concurrent diseases (e.g., transplant glomerulopathy).