development of complications was reported.
CONCLUSION:The therapeutic strategies were extremely heterogeneous. Ursodeoxycholic acid was ineffective in dissolution of gallstones but it had a positive effect on the symptoms. Laparoscopic cholecystectomy was confirmed to be an efficacy and safe treatment for pediatric gallstones.
INTRODUCTIONIn the last years following the extensive use of ultrasound scanning an increasing number of children with cholelithiasis has been identified. In a population based study, prevalence of gallstones and biliary sludge in children was of 1.9% and 1.46%, respectively [1] . In an analogue study, performed in Italian adults, the overall prevalence of gallstones diseases was of 9.5% in men and 18.9% in women [2] . Gallstones disease is the most common and costly of all digestive disease in the United States, resulting in 700 000 cholecystectomies and as many as 1 000 000 hospitalizations annually [3] . The frequency of hospital admission and operation for gallstones increased in Western countries since the 1950s [4] . In England the age-standardized hospital admission rate for cholelithiasis enhanced from 68.7 to 104.9 per 100 000 population between 1989/1990 and 1999/2000 and it increased progressively with age from 1.1 per 100 000 in the 0-14 year age group to 277.1 per 100 000 in the ≥ 85-year age group in 1999/2000 [5] . Guidelines for management of cholelithiasis are available for adults. Cholecystectomy is recommended for