[Clinical behavior of mixed nucleus reno-ureteral calculi].
We made a statistical study, by means of a computer, of 87 crystallographically-analysed stones, corresponding to 85 patients, assessing different clinical data with the mixed composition of the nucleus of these stones. We deduce that in general, the behaviour of these stones is determined by the interaction of their components, with the main substance predominating. The most significant correlations were obtained when we assessed the sex, age, urinary infection, simple or coralliform morphology of the stone, the number of stones formed, permanent, homolateral, kidney damage, overall kidney failure and procedure for removing the stone. We did not find any valid links when we compared the family record of lithiasis, affectation of the counterlateral kidney and the fact whether the stone was from the right or the left.