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Biliary stones in the smooth hemispherical mass protruding into the duodenal lumen

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  • Contributors TS cared for the patient, conducted the literature search, edited the manuscript and prepared the figure. NO and EM edited the manuscript and provided expert opinion on gastroenterology.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; internally peer reviewed.

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