Table 1.

Scoring system based on number of granular casts and RTEC seen per high-power field for differentiating ATN from prerenal AKIa

ScoreDescription
1RTE cells 0 and granular casts 0
2RTE cells 0 and granular casts 1 to 5 or RTE cells 1 to 5 and granular casts 0
3RTE cells 1 to 5 and granular casts 1 to 5 or RTE cells 0 and granular casts 6 to 10 or RTE cells 6 to 20 and granular casts 0
  • a ATN, acute tubular necrosis; AKI, acute kidney injury; RTEC, renal tubular epithelial cells.