- Case report
- Open Access
First experience of robotic spleen-preserving distal pancreatectomy in a child with insulinoma
- Ming-Gen Hu†1,
- Yuan-Hong Xiao†2,
- Dong-Da Song1,
- Guo-Dong Zhao1,
- Yan-Zhe Liu1,
- Zheng Wang2,
- Hao-Yu Li2 and
- Rong Liu1Email author
© The Author(s). 2017
Received: 19 July 2017
Accepted: 6 November 2017
Published: 9 November 2017
An insulinoma is a functional neuroendocrine pancreatic tumor, and surgical resection is indicated. Robot-assisted laparoscopic surgeries have been shown to be generally safe and feasible for treatment of pediatric cases of urologic and digestive disease.
In July 2016, a 9-year-old girl (24 kg, 120 cm) was admitted with a pancreatic tail insulinoma and underwent robot-assisted spleen-preserving laparoscopic distal pancreatectomy. The total procedure time was 155 min, and the blood loss was about 10 ml. The patient recovered without complications.
This case supports that robot-assisted spleen-preserving laparoscopic distal pancreatectomy may be safe and feasible in pediatric insulinoma patients.
Insulinomas are functional neuroendocrine pancreatic tumors that are mainly treated via surgical resection. The traditional open surgeries have been largely replaced by minimally invasive surgeries, including laparoscopic surgery and robot-assisted laparoscopic surgery (RAS). The Da Vinci surgical robot (Intuitive Surgical, Mountain View, CA, USA) offers the advantages of a three-dimensional (3D) surgical field and high-resolution viewing, which allow it to overcome difficulties in complicated surgeries better than conventional laparoscopic surgery. RAS is increasingly being practiced in the treatment of pediatric urologic conditions and digestive disease . However, the use of RAS in pancreatic surgeries in children has not been reported. Here, we report our initial experience of robot-assisted, spleen-preserving laparoscopic distal pancreatectomy in a 9-year-old girl with insulinoma.
The patient was given a 5% glucose intravenous infusion constantly and slowly to prevent hypoglycemia. The robot was placed at the head of the patient. The assistant surgeon was positioned between the patient’s legs, and the surgical nurse stood at the right side of the patient. The patient’s blood glucose level was monitored and kept above 3.4 mmol/L throughout the whole procedure.
The post-operative pathology results indicated a neuroendocrine tumor in the pancreas tail, 2 × 2 × 1.2 cm, mitosis count 3/10 HPF, IHC: Ki-67 (+10%), CgA (+), Syn (3+), SSTR2 (−), CK (+), CD56 (+), SSTR3 (+), SSTR1 (+), β-catenin (+), CD117 (-), and Grade 2, with local nerve involvement.
Discussion and conclusions
Pancreatic insulinoma is an uncommon neuroendocrine tumor with an estimated incidence of 4 per 1,000,000 people worldwide . Most insulinomas are benign and are seen only in children older than 4 years. The classic clinical symptoms are known as “whipple’s triad,” which often begin with psychiatric symptoms. In this case, the insulin/glucose ratio was 4.46 when the patient was experiencing hypoglycemia. Ultrasonography of the thyroid gland and adrenal gland cleared multiple endocrine neoplasia type 1 (MEN1).
Most pediatric insulinomas are curable by surgical removal of the lesion . Most insulinomas are benign, and local resection is achievable. When the tumor is located in the pancreatic surface and encapsulated completely, local enucleation is feasible. Distal pancreatic resection is suitable for the pancreatic body and tail, especially when the tumor is large in size or near the main pancreatic duct. In addition, pancreatoduodenectomy is needed when a lesion is located in the head of the pancreas.
Distal pancreatectomy includes pancreatosplenectomy, spleen-preserving distal pancreatectomy, and vessels-sparing spleen-preserving distal pancreatectomy. The vessels-sparing spleen-preserving distal pancreatectomy can fully retain the physiological structure and function of the spleen to prevent postoperative thrombocytosis, thrombosis, pneumonia diplococcus infection, spleen infarction, spleen abscess, gastric varices, and other complications. It is applicable to benign, small, or well-differentiated tumors on the pancreas tail. However, the pancreas is adjacent to many important organs and vessels, and thus, the practice of this surgery is difficult and high risk.
The Da Vinci surgical robot can provide a 3D, clear, and wide surgical field, with a magnification of ×10–15. It can also complete surgical clamping, grasping, cutting, and suturing effectively and accurately with a great degree of simulation and jittering filtration, which shows an obvious advantage of limiting the surgical field during pediatric abdominal surgeries . This technology has been applied in pediatric urological surgeries and in simple procedures for laparoscopic abdominal and thoracic surgeries, such as gastric folding, common bile duct cyst resection, biliary enteric anastomosis, esophageal resection, etc. However, the robot-assisted laparoscopic operation for pediatric pancreatic surgery has not been reported to the best of our knowledge.
With the accumulation of experience, robot-assisted laparoscopic proximal pancreatic resection, central pancreatic resection, and pancreatic tumor enucleation are feasible . Compared with laparoscopic and open surgery, robot-assisted laparoscopic pancreatic surgeries are preferable due to the increase in the negative margin resection rate and retention rate of spleen and reduced intraoperative blood loss and hospital stays . Preliminary research showed that the robot-assisted laparoscopic pancreatectomy was equally safe with laparoscopic surgery, and it is as safe and feasible for the benign and borderline tumors in the left pancreas [7, 8]. However, there were no experts to carry out a robot-assisted laparoscopic, spleen-preserving pancreatectomy for pediatric insulinoma.
For adult patients, trocars are mainly inserted in the upper abdomen with conventional 5-trocar placements as the abdominal wall area is larger. Children are shorter and the area of the abdominal wall is smaller. Thus, the trocars are placed below the umbilical level. For the present case, we placed the trocars below the umbilicus, and the surgical field was in the left upper quadrant. We arranged the auxiliary holes in the left lower abdomen, with arm 1 and arm 2 in left and right lower abdomen, respectively. The cold light source lens was placed in the middle abdomen pubic symphysis. All the procedures were completed through the four holes without unwanted contact of the equipment.
We believe that the precondition for successful robot-assisted laparoscopic, spleen-preserving distal pancreatectomy for pediatric insulinoma is an accurate surgical approach, which minimizes the interference of tissue around the tumor. In this case, the tumor was located in the pancreatic body tail, which was about 3.0 cm in diameter, and there was a certain border to the pancreatic tissue. The body and tail of the pancreas lost their normal shape, and the tumor was a localized bulge-like shape and with hyperemia on surface. Thus, local enucleation was not suitable, and the distal pancreatectomy was appropriate.
We began using the Da Vinci Robot 5 years ago in 2011. To date, we have accumulated a large number of surgical experiences, more than 500 cases, of which more than 300 cases require pancreatic surgery. The success of this initial experience revealed that the robot-assisted laparoscopic surgeries have the advantages of 3D visual field and flexible operation over conventional laparoscopic surgeries, which lead to a higher chance of surgical success. This case showed that robot-assisted spleen-preserving distal pancreatectomy is safe and feasible for children with insulinoma.
Availability of data and materials
All data generated or analyzed during this study are included in this published article.
HM and YX conceived and designed the study and wrote the paper; DS, GZ, YL, ZW, and HL contributed to the management of the patient; and RL reviewed and edited the manuscript. All authors read and approved the final manuscript.
Ethics approval and consent to participate
This study was approved by the ethics committee of Chinese PLA General Hospital and was carried out in accordance with the Declaration of Helsinki of the World Medical Association. All enrolled patients provided written informed consent.
Consent for publication
We have obtained consent to publish from the participant.
The authors declare that they have no competing interests.
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