calculated kidney non-tumorous lesion measurement ratio of the area occupied by protein casts to the total area of the kidney outer medulla outer stripe and cortex 2014-05-27T14:01:07Z A calculated measurement in which the area occupied by renal protein casts is divided by the total, combined area of the outer stripe of the kidney outer medulla and the kidney cortex, and the result presented as a ratio, fraction, quotient or percentage. Renal protein casts are gelled proteins precipitated in the renal tubules and molded to the tubular lumen. The medulla outer stripe is the section of the renal medula adjacent to the renal cortex and contains portions of the nephron, including the straight proximal tubules, and portions of the loops of henle and outer medullary collecting ducts. JSmith percent area of renal protein casting