Castscontinued
Urinalysis and Body
Fluids Review 508
TYPE DESCRIPTION SIGNIFICANCE COMMENTS
Waxy
Fatty
Broad
From degeneration of cellular & granular
casts. Unfavorable sign.
Maltese crosses with polarized light if lipid
is cholesterol. Sudan III & Oil Red O stain
triglycerides & neutral fats.
Formed in dilated distal tubules & collecting
ducts. “Renal failure casts.”
Homogeneous, opaque,
notched edges, broken ends.
Casts containing lipid
droplets.
Wide. May be cellular,
granular, or waxy.
Urinary stasis.
Nephrotic syndrome.
Advanced renal disease.
