Which urinary finding is most specific for glomerular bleeding?
1Hyaline casts
2Free red blood cells only
3Squamous epithelial cells
4Red blood cell casts✓ 정답
해설
Red cells trapped within a cast must have been incorporated in the tubular lumen along with the protein matrix, which proves that they entered the filtrate at the glomerulus. Free red cells can originate anywhere in the urinary tract and are far less specific.