RT Journal Article T1 IgA Nephropathy Is the Most Common Underlying Disease in Patients With Anticoagulant-Related Nephropathy. A1 Trujillo, Hernando A1 Sandino, Justo A1 Cavero, Teresa A1 Caravaca-Fontan, Fernando A1 Gutierrez, Eduardo A1 Sevillano, Angel M A1 Shabaka, Amir A1 Fernandez-Juarez, Gema A1 Rodriguez Doyagüez, Pablo A1 Gimena Muñoz, Rocio A1 Calle Garcia, Leonardo A1 Cabello, Virginia A1 Muñoz-Terol, Jose Manuel A1 Garcia Santiago, Ana A1 Toldos, Oscar A1 Moreno, Juan Antonio A1 Praga, Manuel K1 IgA nephropathy K1 Acute kidney injury K1 Anticoagulation K1 Hematuria K1 Kidney biopsy AB Anticoagulant-related nephropathy (ARN) is a relatively novel recognized entity characterized by hematuria-associated acute kidney injury (AKI) in the context of overanticoagulation. Preexisting or underlying kidney disease seems to be a predisposing factor; however, few studies have described histologic findings in patients with ARN. We aimed to evaluate underlying kidney pathology in patients on oral anticoagulation who presented an episode of AKI with hematuria in whom a kidney biopsy was performed. Retrospective observational multicenter case study in patients treated with oral anticoagulants who developed macroscopic or intense hematuria followed by AKI. Only patients with available kidney biopsy specimens were included. Histologic findings and clinical data throughout follow-up were analyzed. A total of 26 patients were included with a median age of 75 years (62-80) and a follow-up period of 10.1 months. Of the patients, 80% were male, and most cases (92%) were on anticoagulation with vitamin K antagonists (VKAs). At admission, median serum creatinine (SCr) level was 4.2 mg/dl (2.8-8.2), median international normalized ratio (INR) 2.4 (1.5-3.4), and 11 patients (42%) required acute dialysis during hospitalization. Kidney biopsy results revealed that all patients except 1 had an underlying nephropathy: IgA nephropathy (IgAN) in 19, probable IgAN in 1, diabetic nephropathy in 3, nephrosclerosis in 1, and idiopathic nodular glomerulosclerosis in 1. At 12 weeks after discharge, only 6 subjects (24%) attained complete kidney recovery whereas 7 (28%) remained on chronic dialysis. IgAN was the most common underlying kidney disease in our biopsy-proven series of ARN, in which a significant percentage of patients did not achieve kidney function recovery. PB Elsevier YR 2022 FD 2022-01-10 LK http://hdl.handle.net/10668/22197 UL http://hdl.handle.net/10668/22197 LA en NO Trujillo H, Sandino J, Cavero T, Caravaca-Fontán F, Gutiérrez E, Sevillano ÁM, et al. IgA Nephropathy Is the Most Common Underlying Disease in Patients With Anticoagulant-Related Nephropathy. Kidney Int Rep. 2022 Jan 19;7(4):831-840 DS RISalud RD Apr 23, 2025