Introduction: Gall stones have been classified into three classes based upon their physio-chemical characteristics. Cholesterol stones, pigment stones and mixed stones. Cholesterol stones are formed in gallbladder, while pigment stones are mostly formed in bile canaliculi of liver and mixed stones in entire biliary tract and ultimately grow and settle down in gallbladder. Chemical analysis of these gallstones has revealed that cholesterol stones contained cholesterol, a principle constituent and mixed stones have calcium bilirubinate as principle constituent and a mixed stone consists of salts of cholesterol and bilirubin as major constituent.

Methodology: All adult patients diagnosed as Cholelithiasis admitted in hospital during the study period formed the study subjects.

Results: Study population had mean age of 49 years. Majority of patients were in 51-60 years age group. Age group of 31-40 and more than 60 years group had equal incidence, while other age groups form small subset.

Conclusion: The relation between gender and gall stone formation is not statistically significant in this study