Formation of stones in the KIDNEY. Stones in the KIDNEY, usually formed in the urine-collecting area of the kidney (KIDNEY PELVIS). Their sizes vary and most contains CALCIUM OXALATE. The presence of a calculus in the pelvis of the kidney; this is most often composed of mineral salts and proteins.
Synonyms:
exact_synonym:
Kidney Calculi; Kidney Calculus; Kidney Stones; Renal Calculi; Renal Calculus; Renal stones; Stone - kidney/ureter; calculus of kidney and ureter; kidney stone