Of the patients, 2034 received external drainage(82.5%) and 431 received internal drainage(17.5%) and 586 were performed adjunctive partial hepatectomy (23.8%).

• 手术方式:单纯外引流2034例(82·5%25),单纯内引流手术431例(17·5%25),附加肝部分切除586例(23·8%25)。