I have concretion and not stones in kidney ..... what are this concretions?

Calcification: Concretions are like stones forming inside the kidney itself and not the urinary passages. It can be caused old trauma or infection or the same way a stone forms. It can be surgically removed or monitored if painless.

Interchangeable: Almost. Kidney stone is hard concretion calcium, uric acid, triple phoshate or cysteine or other crystals. Concretion can be a softer collection of salts with or without blood cells &/or proteinaceous or fungus ball material on its way to forming a stone, however might we broken up & passed with copious water or fluid intake, or anti-fungal if yeast. Concetions can be painful & block kidney.