Urinalysis and Body Fluids 6th Edition by Majorie DiLorenzo, Susan Strasinger

Exercise 61

WBC casts are primarily associated with:

A. Pyelonephritis

B. Cystitis

C. Glomerulonephritis

D. Viral infections

Step 1 of 2

Casts:

Casts are cylindrical structures formed in kidney and found in urinary sediment.

Types of casts:

• Hyaline casts, Waxy casts, Mucus resembling casts, RBC casts, WBC casts, granular casts, bacterial casts, fatty casts, mixed cellular casts, broad casts, cylindrical renal tubular cells.

WBC (White Blood Cells) casts:

• WBC casts often consists of neutrophils.

• Infection and inflammation in a nephron causes WBC casts in urine.

• Pyelonephritis is chiefly associated with WBC casts formation.

Pyelonephritis:

• Inflammation of calyces, renal pelvis and kidney tissue due to infection of bacteria.

• Non bacterial infection (For example, acute interstitial nephritis and glomerulonephritis) cause WBC casts formation in urine.

Therefore, “pyelonephritis” is primarily related with WBC casts. Hence, the correct answer is option .