Which of the following is NOT a type of cast?

A cylindrical cast is not recognized as a distinct type of cast in urinalysis. The three commonly identified types of casts include hyaline, granular, and fatty casts.

Hyaline casts are the most common and consist primarily of protein; they indicate a variety of conditions, often linked to dehydration or mild kidney issues. Granular casts contain cellular debris and suggest more severe tubular damage or inflammation. Fatty casts, composed of fat droplets, are indicative of nephrotic syndrome and signify significant renal pathology.

In contrast, while "cylindrical" may describe the shape of some casts, it is not classified as a specific type of cast within the context of renal pathology and its analysis.