Waxy Cylinders

Waxy casts are a type of casts that form in the kidneys and urinary tract. They are large, thick and slightly yellow formations with transverse lines and bells. Waxy casts may be found in severe kidney injury such as necronephrosis.

In necronephrosis, the kidneys are damaged due to lack of oxygen and nutrients. This can lead to the formation of waxy casts, which can be large and thick. These formations can put pressure on surrounding tissues and cause pain and discomfort.

Waxy casts are one of the signs of necronephrosis. They can be found in urine, allowing doctors to diagnose the disease. In addition, waxy casts may indicate other kidney diseases such as glomerulonephritis or pyelonephritis.

If you suspect the presence of waxy casts in your urine, you should consult a doctor for testing. This will help determine the cause of their formation and prescribe appropriate treatment.



The waxy cylinders are large, thick, slightly yellow cylinders with transverse lines and a bell. The cylinders are formed when the formed elements die in the cavity of the renal tubules. Their peculiar structure is due to the compaction of protein substances and an increase in the amount of lipids in the formation of walls.

Macroscopically - blunt ends of round or oval shapes of a yellowish color; shiny, crumble easily, have longitudinal lamination (Hiss folds), longitudinal continuous lines (run parallel to the long axis) and transverse lines parallel to the fibers (Fig. 4.6 b)). Microscopically at their base