Utility of CT Scan in Detection of Melamine - Associated Urinary Stones.

Objective To detail the utility of CT scan in detection of urinary stones induced by melamine tainted formula. Material and Methods A total of 1062 children fed with melamine-contaminated infant formula were screened for urinary stones in our institute from September through December 2008. Ultrasonography of the urinary tract system was performed in all these children. If the children with suspected stones or severe obstruction were presented after ultrasound examination, themulti-detector row CTurographic examination was advocated subsequently. Results Ultrasound examination in combination with multidetector row CT urography could increase the diagnostic rate from 3.4% (36/1062) by ultrasound examination alone to 4.6% (49/1062). Conclusions The specificity and sensitivity of the multidetector row CT urographic examination is higher than ultrasonography.