“…accidental or surgical) (11, 15–17, 21). However, among the mucinous splenic cysts, some cases are derived from ectopic pancreatic tissue (4, 6–8, 12, 14) as well as being secondary to peritoneal pseudomyxoma (3, 5, 9, 10, 13). In addition, several cases involving the peritoneum/retroperitoneum are associated with the smooth muscle layer, which is considered to be derived from either residual or duplicate müllerian duct (20, 22–24).…”