Nephrotic syndrome is caused by various disorders that damage the kidneys, particularly the basement membrane of the glomerulus.This immediately causes abnormal excretion of protein in the urine.

• 肾病综合症可由多种破坏肾脏，特别是破坏肾小球基底膜的病症引起，患病后会造成蛋白质异常排泄进入尿中。