what are hyaline casts in the urine
hyaline casts. ( 1 Hyaline cast) Urinary casts are cylindrical structures produced by the kidney and present in the urine in certain disease states. 2  They form in the distal convoluted tubule and collecting ducts of nephrons, then dislodge and pass into the urine, where they can be detected by microscopy.yaline casts. ( 1 Hyaline cast) Urinary casts are cylindrical structures produced by the kidney and present in the urine in certain disease states. 2  these casts are made of the protein itself.