Fig. 1From: Primary antiphospholipid syndrome associated with anti-phospholipase A2 receptor antibody-positive membranous nephropathypatient’s kidney biopsy. a Staining for IgG4 on immunofluorescence (× 400). b PLA2R-antigen on immunochemistry (× 400). c Primary antiphospholipid syndrome chronic vascular nephropathy with asymmetric fibrous intimal hyperplasia (Periodic-Acid-Schiff X400)Back to article page