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The majority of stones pass spontaneously within 48 hours. If a symptomatic stone does not pass, a procedure by a urologist may be needed. Nephrolithiasis is derived from the Greek nephros- (kidney) lithos (stone) = kidney stone.
coprolith. [ 1 kopâ²rÅlith] 2  a hard mass of feces in the intestinal tract, usually caused by excessive absorption of water from the large intestine.