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Background: Common bile duct stones (CBDS) are estimated to be present in 10-20% of individuals with symptomatic gallstones. A variety of imaging modalities can be employed to identify the condition while management of confirmed cases of CBDS may involve endoscopic retrograde cholangiopancreatography (ERCP), surgery and radiological methods of stone extraction. Clinicians are therefore confronted with a number of potentially valid options to treat individuals with suspected CBDS. Objective: To determine if ERCP sphincterotomy and extraction is effective in management of CBDS ranging from 10 to 20 mm or if surgical intervention is preferred in a sample of patients with common bile duct stones. Patients and Methods: In this study, the data of (30) patients with CBDS who presented for the first time to the department of General surgery at Ain Shams University hospitals, Cairo, Egypt. Were collected during the period of August 2021 to February 2022. Results: In the current study, all patients received proper pre-operative assessment and were operated on using same endoscope set and by experienced operators. Also, all patients were observed for post ERCP complications. The current study found that ERCP stone extraction in stones ranging from 10-20mm success rate shows no significant difference in comparison with results that were published in different recent researches studying ERCP success rate in different stone sizes. Conclusion: The current study found that success rate of ERCP in CBD stones extraction in stones ranging from 10-20 mm in size is similar to success rate in stone extraction compared to other studies not specifying stone size range. Also, complication rate was comparable to other recent published studies' complication rate. [ABSTRACT FROM AUTHOR]