Methods: We performed a retrospective study of 21 patients with carcinomas in the middle and distal part of common bile duct carcinomas (confirmed diagnosis group, CDG) and 18 cases misdiagnosed as bile duct carcinomas (misdiagnosis group, MG).

• 方法：对21例经术后确诊为中下段胆管癌（确诊组）与18例术前误诊为中下段胆管癌（误诊组）病人的临床资料进行回顾性分析。