The mnemonic: POSTCARDS cause Renal Papillary necrosis.
Creator : God knows.
Explanation : This mnemonic helps us in remembering the causes of Renal Papillary necrosis.
P = Pyelonephritis
O = Obstruction of urinary tract
S = Sickle cell hemoglobinopathies, including sickle cell trait
T = Tuberculosis
C = Cirrhosis of the liver, chronic alcoholism
A = Analgesic abuse
R = Renal transplant rejection, radiation
D =
S = Systemic vasculitis, SLE, Lymphocytic proliferative vasculitis and perivasculitis with concentric fibrosis (onion skin)