?Residual? cystic? duct? stones? (CDSs)? after?cholecystectomy? have? been? recognized? as? a? cause? of? post-cholecystectomy?pain.?This?study?was?undertaken?to?determine?the?incidence?of?CDSs?during?laparoscopic?cholecystectomy?(LC).?A?cohort?of?330?consecutive?patients?(80?males?and?250?females)?undergoing?LC?between?November?2006?and?May?2010?was?studied.?Their?age?ranged?between?16?and?88?years?(median?50,?IQR:?36.62).?The?data?were?prospectively?collected?of?preoperative?liver?function?tests,?imaging,?the?presence?of?intraoperative?CDSs,?and?common?bile?duct?stones?at?on-table?cholangiogram.?CDSs?were?detected?intraoperatively?in?64?of?the?330?patients?(19%).?Ultrasound?failed?to?detect?CDSs?in?any?of?these?cases.?Deranged?liver?function?tests?were?noted?in?73%?of?the?patients?with?CDSs?and?in?57%?without?CDSs.?Common?bile?duct?stones?were?detected?in?9%?(29)?of?the?330?patients.?CDSs?occur?commonly?at?routine?cholecystectomy,?and?preoperative?investigations?are?not?helpful?in?their?diagnosis.?As?CDSs?may?lead?to?postoperative?morbidity,?they?should?be?actively?sought?out?during?surgery?if?present.