Question of the Day

Look for hyaline casts (clear, semitransparent) with mild glomerular leakage.

Look for cellular casts (recognizable cells in cast) with sloughed epithelial cells, or red blood cells with renal hemorrhage, or white blood cells with pyelonephritis (kidney infection).

Waxy casts in a urine sediment are thought to be older versions of granular casts, and may indicate chronic to severe renal tubular degeneration. They are wide, blunt or square-ended, and opaque.

You may also see granular casts (common, nonspecific, made of degenerating cells) or fatty casts in some cats.