Celiomesenteric trunk: New classification based on multidetector computed tomography angiographic findings and probable embryological mechanisms

Table 1 New definition and classification for description of celiomesenteric trunk

Definition and type	Description
Definition
CMT	We defined the CMT as a single common trunk arising from the aorta and its branches including the SMA and at least two major branches of the celiac trunk
Type (abbreviation)
HGSM trunk (type I)	Hepato-gastro-spleno-mesenteric trunk
HSM trunk + LGA (type II)	Hepato-spleno-mesenteric trunk with LGA arising from the aorta
GSM trunk + CHA (type III)	Gastro-spleno-mesenteric trunk with CHA arising from the aorta
HGM trunk + SA (type IV)	Hepato-gastro-mesenteric trunk with SA arising from the aorta
Other (type V)	Any other variation that meets the above definition of the CMT

CMT: Celiomesenteric trunk; SMA: Superior mesenteric artery; LGA: Left gastric artery; CHA: Common hepatic artery; SA: Splenic artery; HGSM: Hepato-gastro-spleno-mesenteric; HSM: Hepato-spleno-mesenteric; GSM: Gastro-spleno-mesenteric; HGM: Hepato-gastro-mesenteric.

Table 2 Incidence and percentage of various types of celiomesenteric trunk (n = 5580)

Type	Number	Percentage (%)	P value
Normal anatomy	5031	90.16
Anatomical variation	549	9.84
CMT	171	3.06
Sex
Male	120/3774	3.18	0.471
Female	51/1806	2.82
Type
Length of single common trunk
Long type	106/171	61.99	0.0001c
Short type	65/171	38.01
Variation pattern
HGSM trunk (type I)	96/171	56.14	0.0001c
HSM trunk + LGA (type II)	57/171	33.33
GSM trunk + CHA (type III)	4/171	2.34
HGM trunk + SA (type IV)	3/171	1.75
Other (type V)	8/171	4.68
Origin of LGA
Celiac trunk (type a)	92/171	53.80	0.0001c
Abdominal aorta (type b)	57/171	33.33
Single common trunk (type c)	11/171	6.43
Other artery (type d)	8/171	4.68
Failed to identify	3/171	1.75
Other variation	378	6.77

^cP < 0.001. CMT: Celiomesenteric trunk; LGA: Left gastric artery; CHA: Common hepatic artery; SA: Splenic artery; HGSM: Hepato-gastro-spleno-mesenteric; HSM: Hepato-spleno-mesenteric; GSM: Gastro-spleno-mesenteric; HGM: Hepato-gastro-mesenteric.