A total of 365 in-hospital patients diagnosed with PMN at Shandong Provincial Hospital affiliated to Shandong First Medical University from January 2018 to August 2021 were enrolled in the study, including 355 biopsy-proven PMN and 10 anti-PLA2R antibody positive patients who did not receive renal biopsy because of extensive venous thrombosis. Here, PLA2R1 is linked to Venous thrombosis.