Final answer:
A Hyaline (proteinuria) cast in urine indicates the presence of protein in the urine, which is known as proteinuria. This condition is often seen in diseases of the kidney, such as nephritis and nephritic syndrome, as well as in cases of hyaline degeneration of the kidney.
Step-by-step explanation:
A Hyaline (proteinuria) cast in urine indicates the presence of protein in the urine, which is known as proteinuria. Proteinuria occurs when there is damage to the glomerulus, which allows proteins like albumin to leak into the filtrate from the blood. This condition is often seen in diseases of the kidney, such as nephritis and nephritic syndrome, as well as in cases of hyaline degeneration of the kidney.