PLA2R1 and idiopathic membranous glomerulonephritis: The ability to test for the presence of anti-PLA2R autoantibody has resulted in improved recognition and differentiating primary vs. secondary membranous GN, as well as assisting clinicians in the management of patients pre and post-transplantation, identifying those patients at high risk of post-transplant disease recurrence that may benefit from more intensive monitoring post-transplant as well as monitoring response to treatment (44, 152, 153).