Tiny cylindrical particles in the urine are Hyaline Casts, and they are protein-based, originating from the reticulated blood cells in the kidneys. Kidney diseases or injuries are possible causes. Dehydration, fever, and diseases such as glomerulonephritis are among the causes. Detecting them during a urinalysis aids in diagnosing the underlying cause. This blog is comprised of the hyaline casts, the causes, symptoms, diagnosis tools, and the approach to treating them. Keep reading below.