PLA2R1 and nephrotic syndrome: A case report of an elderly female patient with PMN combined with crescent formation (72%) who presented with nephrotic syndrome, haematuria and rapidly progressive renal dysfunction with high serum antibody titres was treated with plasma exchange and melphalan combined with glucocorticoids, and after clearance of anti-PLA2R antibodies, the patient experienced complete resolution of proteinuria and recovery of renal function [15].