1, The little boy was diagnosed with nephrolith last Friday and stayed in hospital for one week.

2, An experimental study was made to observe the nephrolith formation in the kidney-deficiency rats(K-D rats).

3, Results The normal cases were 16 cases and the abnormal cases were 22 cases, including hydronephrosis, nephrolith, ureter stone, ureter malformation etc.

4, High uric calcium was the latent dangerous factor of nephrolith . Conclusion The excessive calcium influenced the growth of rats and harmed certain viscera.

5, Acids or acidic salts may pile up in joints or different organs can induce inflammations, arteriosclerosis, nephrolith, arthritis and gout.