Urinary cast
In human and animal urine, there are cylinders, which are also known as urinary casts. It refers to small elongated structures glued together, which can be seen on microscopic examination of urine sediment. They form in the small tubes excretion of the kidney, the tubule system, and are often an expression of severe kidney disease ( glomerulonephritis, pyelonephritis, etc.)
The English term for cylinder casts.
Types of cylinders
- Red blood cell casts
- Granular casts (protein cylinder)
- Hemoglobin cylinder
- Leukozytenzylinder
- Wax cylinder
- Ephitelzylinder
- Hyaline casts
First Description
The casts were first in 1844 correctly interpreted by Jakob Henle. Henle realized that the casts with the spouts of affected tubules were identical in tissue of the kidney. At that time it was customary to look at the urine sediment microscopy. The cylinders were described as tubular fibrous clot.