## 3 Results
### Variations at The Splenic Artery's Origin  
The hepatosplenic trunk is an anatomical variation defined as the fusion of the splenic artery with the common hepatic artery (Figure 2). This variation can present as a single branch of the celiac trunk; in these cases, the left gastric artery originates from the abdominal aorta artery [48; 49; 50; 51]. Alternatively, it may originate directly from the abdominal aorta and the left gastric artery arises from the abdominal aorta, the common hepatic artery, or the splenic artery (Figure 3) [52]. In this review, four studies were found that reported the presence of the hepatosplenic trunk [3; 34; 51; 53]. The first two articles are case studies, which are reports of accidental findings [51; 53]. The third study aimed to look for anatomical variations in the splenic artery and the presence of three hepatosplenic (HTS) trunks was reported in a total of 26 cadavers studied, which translates into an incidence of 11.5% [3]. The study by [PERSON] et al. (2019) found 35 cases of an HTS trunk in 750 patients (4.67%) [54]. The hepato-spleno-mesenteric trunk is an anatomical variation in which the hep-atosplenic trunk and the superior mesenteric artery arise from a common vessel, while the left gastric artery originates directly from the abdominal aorta slightly superior to the hepato-spleno-mesenteric trunk. Its prevalence is estimated at 0.40% [55]. In this review, seven studies were found that reported the presence of the hepato-spleno-mesenteric trunk [4; 33; 51; 56; 57]. These studies are case studies, reporting a similar origin to that described in the study by [PERSON] et al. (2009). That study had a N of 6 patients; the authors found an SA arising directly from the superior mesenteric artery (SMA) and the common hepatic artery arose from the abdominal aorta [43]. Moreover, the study by [PERSON] et al. (1989) found that in 126 patients (99.2%) out of 127, the SA arose as a single trunk from the coeliac axis in all but one case, where a second splenic artery was found arising directly from the aorta and supplying the upper pole [44]. Additionally, [PERSON] et al. (2017) reported on 15 anatomical preparations: 5 in adult humans, 3 of the male sex and 2 of the female sex, with ages ranging between 48 and 63 years, and 10 human fetuses, between 20 and 29 weeks of age, 6 female and 4 male. They found that three adult human spleens had an SA origin at the celiac trunk and the remaining 40% of adult spleens had a direct tripod origin from the anterior aspect of the abdominal aorta. Regarding the sample of fetuses, it was found that in fetuses between 20 and 24 weeks, the AS originated in the celiac trunk in three (75%), while the remaining fetus showed an AS originating in the form of a direct tripod from the anterior wall of the abdominal aorta (25%). In fetuses from 25 to 29 weeks, five (83.3%) had an SA originating from the celiac trunk and one (16.7%) from the tripod shape, in which the SA was the longest [16]. Figure 1: The search flowchart is shown in the image. Figure 3: The image shows the splenic artery arising from the abdominal aorta. Abbreviations: abdominal aortic (AA), splenic artery (SA), common hepatic artery (CHA), left gastric artery (LGA). Figure 2: The image shows the hepatosplenic trunk. Abbreviations: celiac trunk (CT), splenic artery (SA), common hepatic artery (CHA), left gastric artery (LGA). The celiac-mesenteric trunk is an extremely rare anatomical variant in which the celiac trunk and the superior mesenteric artery originate from the abdominal aorta through a common trunk. According to the study carried out by [PERSON], the celiac-mesenteric trunk represents less than 1.4% of all anomalies in the origin of the splenic artery [58]. [PERSON] et al. (2019) found eight (1.07%) (two females, six males) instances of SA originating from the celiac-mesenteric trunk (CMT), which they described as type 5 CMTs [34]. The gastrogenic trunk is an anatomical variant described as a common trunk of origin for the left gastric artery and the splenic artery.