Total laparoscopic excision of retroperitoneal ganglioneuroma: A case report

•Retroperitoneal tumor of >10 cm in size is usually treated by laparotomy surgery.•However, totally laparoscopic approach can be performed with good outcomes.•Adaptation of laparoscopic surgery should be considered based on organ or vessel invasion and adhesion around the tumor.•This approach is less invasive and achieves good cosmetic outcomes.•Totally laparoscopic surgery should be considered for retroperitoneal tumor excisions.