Parenchymal-sparing liver surgery in patients with colorectal carcinoma liver metastases

Table 1 Different parenchymal-sparing operative procedures

Type of resection	Segment/s resected
Segment-oriented
Monosegmentectomy	Any isolated segment
Bisegmentectomy	Two contiguous segments
Right posterior sectionectomy	S6 and 7
Right anterior sectionectomy	S5 and 8
Right inferior bisegmentectomy	S5 and 6
Right superior bisegmentectomy	S7 and 8
Central anterior bisegmentectomy	S4b and 5
Central posterior bisegmentectomy	S4a and 8
Left medial sectionectomy	S4a and 4b
Central hepatectomy	S4, 5 and 8
Upper Transversal Hepatectomy	S7, 8, 4a and 2 + RHV and MHV
Non-segment-oriented
Corkscrew technique	Any segment
Mini-mesohepatectomy	Partial S8 and 4a + MHV
Mini upper-transversal hepatectomy	Partial S7, 8 + RHV
Hepatic Vein-Sparing Hepatectomy	Partial S7, 8, and 4a ± 1 paracaval
Systematic extended right posterior sectionectomy	Complete S6-7 + partial S5 and/or S8 (en-block)
Liver tunnel	Partial S4a, 8 and 1
Lower inferior hepatectomy	S3, 4b, 5, 6 and 7
Local ablation1	Any

¹Combined with other surgical resection. MHV: Middle hepatic vein; RHV: Right hepatic vein.