Neuroendocrine tumor of the pancreas (pNET) is a wide-spread oncological disease, and its treatment is a widely discussed topic in modern pancreatology. Functioning pNET mainly manifest with hormonal hypersecretion syndrome (accordingly to the type of hormone), whereas nonfunctioning tumors may not produce any symptoms and remain unnoticed, complicating the diagnosis and postponing medical care. Course of the disease and patient’s prognosis largely depend on the stage of the disease and tumor histology. Higher tumor grade, lymph node and liver metastasis, and a larger primary tumor generally portend relatively poor survival. Prognosis of the patients with pNET improves substantially when the disease has been diagnosed and treated on the early stages. Endocrine testing, imaging modalities among which CT, MRI and endoscopic ultrasound are considered most useful; and histological evidence are all required to accurately diagnose pNETs. Recently an “aggressive” approach to pNET treatment has become most popular in academic centers throughout the world. Surgical resection of the tumor is considered the most effective treatment option and a gold treatment standard. Laparoscopic pancreatic resections also play major role in the treatment of pNET. Laparoscopic approach is safe and effective modality, so the number of laparoscopic operations has been growing last years. Among the benefits of minimally invasive surgery are lesser postoperative pain, shorter hospital length of stay, better cosmetic appearance and shorter disease-related inability of work period. In these case series characteristics of the early diagnosis and successful laparoscopic surgical treatment for the patients with pNET of the right anatomical segment of the pancreas are described.

The aim of the study was to assess the frequency of complications after laparoscopic Nissen fundoplication in patients with a hernia of the esophageal orifice of the diaphragm, to determine the features of diagnosis and treatment of gas-bloat syndrome. Materials and methods. According to the results of the meta-analysis, 10 % of patients with esophageal hiatal hernia developed inability to belch, 19 % – gas-bloat syndrome, 59 % – flatulence after laparoscopic Nissen fundoplication. The treatment results of two patients with gas-bloat syndrome at the SI “Shalimov’s National Institute of Surgery and Transplantation” of the National Academy of Medical Sciences of Ukraine for the period 2018–2020 are presented. Reconstructive fundoplication according to Toupet was performed in one patient, and one patient underwent endoscopic dilatation of the esophagogastric junction using a Boston Scientific 3.0 balloon. Conclusions. Pain reduction after a nasogastric tube placement and air venting from it is a tool to diagnose gas-bloat syndrome. Increasing aerogastria and stomach enlargement in 30–60 minutes after an additional meal make X-ray examination more informative and can be considered as new radiological symptoms. Toupet refundoplication is an effective surgical treatment for gas-bloat syndrome in patients after complete Nissen fundoplication.

The aim. To evaluate the features and results of minimally invasive surgical treatment of patients with hiatal hernia (HH) and its main complications using modern endoscopic and laparoscopic technologies. Materials and methods. The treatment results of 244 patients with HH and its main complications are given. 28 (11.5 %) patients had a combination of HH with Barrett’s esophagus, and 34 (13.9 %) patients had a combination of HH with esophageal stricture. In 62 patients with complications of HH, two-stage treatment tactics was used. Complete laparoscopic fundoplication was performed in 185 (75.8 %) patients, posterior partial Toupet fundoplication – in 59 (24.2 %) patients. Laparoscopic posterior crurography was performed in 198 (81.1 %) patients. In 7 (2.9 %) posterior crurography was supplemented by anterior. Teflon gaskets were used in 25 (10.3 %) patients during posterior crurography. Synthetic mesh prostheses were implanted in 14 (5.7 %) patients. Results. In patients with esophageal stricture, the effect was observed after the second session of bougienage or hydro-dilation in 70.6 % of cases, after the third session - in the remaining cases. In Barrett's esophagus, a single session of argon plasma coagulation was radical in 100 % of patients with a lesion size less than 1 cm and in 85 % of patients with lesions of 1 cm to 2 cm in size. Recurrence of type III HH occurred more often than type I. The surgery required sufficient mediastinal dissection and mobilization for an adequate esophagus pull-through. In the surgical treatment of type IV HH, the use of composite diaphragmatic meshes was considered. The effectiveness of antireflux surgical intervention, as well as prevention of specific complications was depended on the technical features of the fundoplication cuff formation. Conclusions. In the treatment of Barrett’s esophagus or esophageal stricture in combination with HH, the two-stage tactics is optimal: stage I – ablation or dilatation, and stage II – laparoscopic antireflux surgery. Laparoscopic fundoplication is an effective and safe method for treatment of patients with HH.

Laparoscopic removal of concrement in Bouveret syndrome

Objective. To improve the results of treatment in patients with insufficiency of duodenal sutures. Materials and metods. Retrospective and prospective investigation was accomplished on 17 patients, suffering insufficiency of sutures, injuries and fistulas of duodenum, who were admitted for treatment into Shalimov National Institute of Surgery and Transplantology during 2010-2020 yrs. In all the patients a complex examination, including a general clinical one, special laboratory and instrumental methods of investigation, was conducted. Results. Miniinvasive endoscopic method for the treatment of the duodenal sutures insufficiency was elaborated with a patent obtaining, which consists of endoscopic placement of a covered nitinol self-expanding stent into the defect zone. In presence of the complication, constituting a duodenal fistula, there was proposed to place a covered nitinol self-expanding stent into the defect zone together with vacuum-therapy from the side of the fistula external aperture. Due to application of the treatment method elaborated, it have become possible to reduce the morbidities quantity and to shorten the patients’ stationary stay by 36% - from (38.1 ± 4.16) to (25.4 ± 3.7) bed-days (p < 0.05). General mortality in the investigated group have constituted 9%, what was in two times lower, than the mortality index in a control group - 16%. Conclusion. The method, investigated by us, have constituted a combined approach with endoscopic placement of a self-expanding stent into the defect zone together with vacuum therapy from the external aperture of fistula, promoting improvement of the treatment results of the duodenal sutures insufficiency, accompanied by shortening of the patients’ stationary stay and reduction of morbidity and mortality.