Left hepatic trisectionectomy for perihilar cholangiocarcinoma with a right-sided round ligament: A case report

Table 1 Clinicopathological characteristics and surgical procedures of 7 patients with a right-sided round ligament at our hospital

Case	Sex	Age	Diagnosis	Operation	Portal anatomy	Portal configuration[12]	Biliary architecture[11]	Volumetry of the posterior/anterior/left liver
1	M	58	Hepatocellular carcinoma	Partial hepatectomy	Ppost-i	Z shape	NA	53%/32%/14%
2	M	58	Hepatocellular carcinoma	Partial hepatectomy	Ppost-i	Z shape	NA	56%/28%/15%
3	F	54	Colorectal liver metastasis	Right hemihepatectomy and choledochojejunostomy	P-bifurcation	I shape	NA	33%/30%/34%
4	M	71	Benign bile duct stenosis	Left trisectionectomy	Ppost-i	Z shape	Independent right lateral type	44%/33%/21%
5	F	41	Pancreatic head cancer	Pancreaticoduodenectomy	Ppost-i	Z shape	Total left type	41%/31%/27%
6	M	70	Perihilar cholangiocarcinoma	Left trisectionectomy	Ppost-i	Z shape	Total left type	42%/35%/21%
7	M	74	Combined hepatocellular cholangiocarcinoma	Extended posterior sectionectomy	P-bifurcation	I shape	Symmetrical type	21%/30%/44%1

¹In case 7, the posterior section was atrophied due to a tumor thrombus in the posterior branch of the portal vein. RSRL: Right-sided round ligament; Ppost-i: Independent branching of the posterior portal branch; P-bifurcation: Portal vein bifurcation type; NA: Not available.