Preoperative assessment of vascular anatomy of inferior mesenteric artery by volume-rendered 3D-CT for laparoscopic lymph node dissection with left colic artery preservation in lower sigmoid and rectal cancer

Table 2 Distance from IMA root to LCA root and branching types of IMA

Sex	n	Age (range)/yr	Distance(range)/min	98 patients withbranching type
				A	B	C	D
Male	63	68.7 (30-89)	41.8 (25.3–73.5)	6	28	21	7
Female	37	67.5 (20-90)	42.3 (23.2–75.0)	4	17	6	9
Total	100	68.3 (20-90)	42.0 (23.2–75.0)	10	45	27	16

LCA was missing in two patients (1 male and 1 female). D: Branching type undetermined.