Objective To explore the diagnosis and treatment of unsuspected gallbladder cancer (UGC)related with laparoscopic cholecystectomy(LC).Methods From January 1995 to Dece m ber 2008,4520 cases of LC were performed,UGC waS discovered in 15 cases.Clinical data of the 15 cases were analyzed retrospectively.Results Among the 15 cases of UGC,7 were discovered intraoperatively,and 8 were diagnosed postoperatively.Postoperative pathological examination showed Nevin stage I in 4 cases,stage Ⅱin 7 cases,stage Ⅲ in 3 cases,stage Ⅳ in 1 case.LC was carried out in the patients of Nevin stage I.Radical resection of gallbladder cancer was performed on the patients at stage Ⅱ and stage Ⅲ.One patient at stage Ⅳ received extended radical resection.The patients were followed up from 6 months to 5 years,during the period 3 cases were died and 12 cases were still alive,the 5-year survival rate wag 80.0%.Conclusions Most of LC-related UGC cases are early cancer.Frozen section examination should be performed for high-risk groups and suspicious persons,which contributes to the discovery of UGC.LC can achieve the radical purpose of Nevin stage I patients,Nevin stage Ⅱ-Ⅳ requires open radical operation.