title: [Encrustation and stone formation in double J ureteral stent: report of two cases].
abstract: We recently experienced two cases of encrustation and stone formation on double J ureteral stent which had been indwelt at pyeloplasty and at pyelolithotomy. In these patients, bacteriuria and pyuria had continued. Encrustation and stone formation were recognized by follow-up X-ray fairly soon after operation. Judging from our experience, encrustation and stone formation should be suspected in patients with persistent bacteriuria and/or pyuria and who have episodes of urolithiasis. To avoid encrustation and stone formation, the ureteral stent should be replaced more frequently.
mesh_terms: D000293:Adolescent; D000328:Adult; D001437:Bacteriuria / Q000209:etiology; D002130:Calcium Phosphates / Q000032:analysis; D002408:Catheters, Indwelling / Q000009:adverse effects*; D006801:Humans; D008274:Magnesium / Q000032:analysis; D017616:Magnesium Compounds; D008297:Male; D010710:Phosphates / Q000032:analysis; D014513:Ureter; D014545:Urinary Calculi / Q000209:etiology* / Q000378:metabolism
chemical_list: D002130:Calcium Phosphates; D017616:Magnesium Compounds; D010710:Phosphates; C030781:magnesium phosphate; D008274:Magnesium