## 3 Results
### Quantitative Results  
Of the 35 included studies (Table 3), 4 were from North America [3; 16; 24; 28], 1 was from South America [46], 13 were from Asia [5; 6; 13; 14; 17; 18; 20; 23; 27; 39; 40; 43], 16 were from Europe [3; 15; 19; 23; 24; 26; 29; 30; 31; 32; 35; 38; 39; 41; 42; 44], and 1 was from Africa [45]. In relation to the type of study, nineteen reviewed works corresponded to case studies [5; 10; 13; 15; 17; 18; 20; 21; 22; 23; 28; 29; 31; 33], four were descriptive studies [3; 6; 32; 61], and one was a retrospective study [18]. The last five studies had n \(>\) 1 [3; 6; 14; 32; 33]. The total number of specimens in the 24 studies analyzed was 684. In relation to gender, five studies did not report the gender of the individuals analyzed [3; 14; 25; 27; 33], eleven studies analyzed individuals of the male gender [13; 15; 17; 18; 20; 22; 23; 24; 26; 28; 33] and five of the female gender [19; 23; 29; 30; 31], and three [3; 6; 9; 32] studies included individuals of both genders. The percentage of men in studies with n \(>\) 1 fluctuated between 55.2% and 82.5%, with a mean of 67.7%. The percentage of women in studies with n \(>\) 1 fluctuated between 17.5% and 44.8%, with a mean of 32.3%. For the calculation of the incidence of anatomical variations, only studies with n greater than 1 [6; 14; 16; 32] were included. The variation in the origin of the splenic artery was between 1.1% and 40% (origin in the abdominal aorta, hepatomesenteric trunk, and gastrosplenic trunk). Path variations fluctuated between 2.6% and 40% (anterior, retro, or intrapancreatic) (Figure 5). Of the studies included in this review, only one reported the incidence of anatomical variation in the entry of the splenic artery to the spleen (42.3%) [3]. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Author. Year** & **Type of Study and Sample (n)** & **Includes and Type of Variation** & **Country/Geographic Region** & **Gender** \\ \hline [PERSON], 1995 [22] & Descriptive study & & & & \\  & (29 specimens) & & & & \\ \hline [PERSON] et al., 2018 [33] & Case study & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\ \hline [PERSON] et al., 2019 [4] & Descriptive observational study & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\ \[PERSON] et al., 2021 [55] & Descriptive observational study & & & & & \\  & (50 codavares) & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\ \[PERSON] et al., 2015 [46] & Descriptive observational study & & & & & \\  & (317 patients) & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\ \[PERSON] et al., 2020 [77] & Descriptive study & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\  & & & & & \\ \[PERSON] et al., 1986 [8] & Descriptive study & & & & & \\  & & & & & \\  & & & & \\  & & & & & \\  & & & & & \\  & & & & \\  & & & & & \\  & & & & \\  & & & & & \\  & & & & \\  & & & & & \\  & & & & \\ \[PERSON] et al., 2003 [9] & Descriptive study & & & & & \\  & & & & & \\  & & & & \\  & & & & & \\  & & & & \\  & & & & \\  & & & & & \\  & & & & \\ \hline \end{tabular}
\end{table} 
Table 3: _Cott._ \begin{table}
\begin{tabular}{c c c c c c} \hline
\begin{tabular}{c} Total of 127 human systems were \\ spot-motion specimens; the \\ remaining 77 were from dissection \\ room cadaures. \\ \end{tabular} \\ \hline \end{tabular}
\end{table} 
Table 3: Cont. Of the nineteen studies included with n = 1 [3, 10, 13, 15, 17, 18, 19, 20, 22, 23, 24, 25, 26, 27, 29, 30, 33, 58], sixteen reported variations in the origin of the splenic artery [2, 3, 6, 13, 14, 16, 19, 20, 21, 22, 23, 24, 29, 30, 31] and described the presence of a hepatospheric trunk [9], a mesenteric hepatospheric trunk [4, 33, 54, 56, 57, 63], a gastrosplenic trunk [14, 19, 29], and an origin of the splenic artery from the abdominal aorta artery [6, 16, 31].