Portal vein-based subsegmental classification of liver segment four for parenchyma-sparing laparoscopic resection: A retrospective study

doi:10.3748/wjg.120736

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World Journal of Gastroenterology

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1007-9327

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Baishideng Publishing Group Inc, 7041 Koll Center Parkway, Suite 160, Pleasanton, CA 94566, USA

Retrospective Study

Copyright: ©Author(s) 2026. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial (CC BY-NC 4.0) license. No commercial re-use. See permissions. Published by Baishideng Publishing Group Inc.

World J Gastroenterol. Nov 28, 2026; 32(44): 120736
Published online Nov 28, 2026. doi: 10.3748/wjg.120736

Table 1 Portal vein-based classification of segment 4 (n = 207), n (%)

	Overall (n = 207)
New S4 classification subtypes
Type I (cranial-caudal subdivision)	120 (58.0)
Ia (bilateral trunk type, Figure 3)	55 (26.6)
Ib (unilateral trunk type, Figure 4)	20 (9.7)
Ic (dispersed branching, Figure 5)	45 (21.7)
Type II (left-right subdivision)	78 (37.7)
IIa (bilateral trunk type, Figure 6)	27 (13.0)
IIb (unilateral trunk type, Figure 7)	51 (24.6)
Type III (scattered pattern, Figure 8)	9 (4.3)

S4: Segment 4.

Full Size Table

Citation: Huang K, Hu HY, Chen K, Chen XY, Chen Z, Sun Y, Du CY, Chang GX, Fu H, Hu C, Xiao H, Lan X. Portal vein-based subsegmental classification of liver segment four for parenchyma-sparing laparoscopic resection: A retrospective study. World J Gastroenterol 2026; 32(44): 120736
URL: https://www.wjgnet.com/1007-9327/full/v32/i44/120736.htm
DOI: https://dx.doi.org/10.3748/wjg.120736

Huang K, Hu HY, Chen K, Chen XY, Chen Z, Sun Y, Du CY, Chang GX, Fu H, Hu C, Xiao H, Lan X. Portal vein-based subsegmental classification of liver segment four for parenchyma-sparing laparoscopic resection: A retrospective study. World J Gastroenterol 2026; 32(44): 120736 [DOI: 10.3748/wjg.120736]

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