an abnormal stone, or concretion, composed primarily of oxalates and phosphates, found in the kidney.
(pathol) Also called renal calculus. a hard mass formed in the kidney, usually composed of oxalates, phosphates, and carbonates
(mineralogy) another name for nephrite
kidney stone n.
A small hard mass in the kidney that forms from deposits chiefly of phosphates and urates. Also called nephrolith.
A calculus that originates in the kidney and is usually composed of calcium salts, uric acid, cystine, and other compounds. Kidney stones cause extreme pain and bleeding if they obstruct the passage of urine in the kidney or in the ureter. They can often be treated with lithotripsy .
- Renal carcinosarcoma
renal carcinosarcoma n. See Wilms tumor.
- Renal cast
renal cast n. Any of various casts that are formed in the renal tubule and found in the urine and consist of materials such as albumin, cells, and blood.
- Renal clearance
renal clearance n. The volume of plasma completely cleared of a specific compound per unit time and measured as a test of kidney function.
- Renal column
renal column n. Any of the prolongations of cortical substance separating the renal pyramids.