[Complications of percutaneous endoscopic gastrostomy in intensive care patients with dysphagia associated with neurological disorders]. / Oslozhneniya chreskozhnoi endoskopicheskoi gastrostomii u reanimatsionnykh bol'nykh s sindromom disfagii tsentral'nogo geneza.

OBJECTIVE: To develop an effective method for percutaneous endoscopic gastrostomy using gastropexy technology. MATERIAL AND METHODS: We retrospectively analyzed 260 ICU patients with dysphagia associated with neurological disorders between 2010 and 2020. All patients were divided into two groups: the main group (n=50) - percutaneous endoscopic gastrostomy with gastropexy, control group (n=210) - surgery without fixing the anterior wall of the stomach to the abdominal wall. RESULTS. G: Astropexy significantly reduced the incidence of postoperative complications (p=0.045) and severe complications (grade IIIa and higher) (χ2=3.701, p=0.055). Early postoperative complications occurred in 20 (7.7%) patients. Surgery and subsequent treatment were associated with normalization of leukocyte count (p=0.041), C-reactive protein (p=0.024) and serum albumin (p=0.0012). Mortality was similar in both groups. Overall 30-day mortality rate in both groups was 20.8% that was associated with clinical severity of patients. Percutaneous endoscopic gastrostomy was not the direct cause of death in any case. However, complications of endoscopic gastrostomy aggravated the underlying disease in 2.9% of cases. CONCLUSION: Percutaneous endoscopic gastrostomy with gastropexy reduces the incidence of postoperative complications.

[Surgical anatomy of liver segment iv and its importance in hepatobiliary surgery]. / Khirurgicheskaia anatomiia iv segmenta pecheni i ee znachenie v gepatobiliarnoi khirurgii.

The purpose of this article was to describe clinical anatomy of liver segment IV and determine its significance in liver resection surgery and within integrated approach in the treatment of malignancies of this area.

[Predictors of outcomes in surgery for hilar cholangiocarcinoma]. / Prognosticheskie faktory rezul'tatov khirurgicheskogo lecheniia vorotnoi kholangiokartsinomy.

AIM: To determine significant predictors of long-term outcomes of surgery for portal cholangiocarcinoma. MATERIAL AND METHODS: Analysis included 49 out of 84 patients who were operated at the Vishnevsky Institute of Surgery in 2003-2016. Morphological examination (2011-2016) revealed great percentage of following positive variables: micro- (42.9%) and lymphovascular invasion (11.8%), positive resection margin (59.2%), perineural invasion (83.3%), depth of invasion - (83.3%), cells in surrounding fatty tissue (92.3%), invasion of entire thickness of bile ducts' walls (57.1%). Hemihepatectomy was carried out in 50 (59.5%) cases, advanced hemihepatectomy - in 16 (19%) patients. Left-sided hemihepatectomy (34.6%) was more common compared with right-sided hemihepatectomy (8.6%) for biliary confluence lesion (Bismuth-Corlette type IV). RESULTS: TNM stage (p=0.29), tumor localization Bismuth-Corlette type (p=0.10), regional lymph nodes metastases (p=0.77) do not significantly affect survival in univariate analysis. At the same time, TNM stage was significant factor if patients dividing into groups was considered (p=0.05). In regression analysis tumor cells differentiation (p=0.00028), positive resection margin (p=0.0034), perineural invasion and depth of invasion (p=0,00086) were significant predictors of survival. Multivariate analysis confirmed prognostic role of lymphovascular invasion alone (p=0.05). There was no correlation between survival and TNM stage (η=0.057), depth of invasion (η= -0.229) and lymphovascular invasion (η= -0.143645). There was significant reverse moderate correlation between survival and perineural invasion (η= - 0.468750), resection margin (η= -0.558) and tumor differentiation grade (η= -0.481). CONCLUSION: Significant predictors of long-term outcomes of surgery for portal cholangiocarcinoma are TNM stage, lymphovascular invasion, tumor cells differentiation, perineural invasion.

[New criteria of radical surgery and long-term outcomes of hilar cholangiocarcinoma management]. / Novye kriterii radikal'nosti operatsii i otdalennye rezul'taty lecheniia vorotnoi kholangiokartsinomy.

AIM: To develop new criteria of radical surgery for hilar cholangiocarcinoma (HCC). MATERIAL AND METHODS: There were 165 HCC patients who underwent surgery in 1986-2016 at the Vishnevsky Institute of Surgery. TNM stage distribution: stage I - 4 (2.4%), II - 45 (27.3%) (29 of them are referred to the 1st period of work), IIIA - 23 (13.9%), IIIB - 41 (24.8%), IVA - 35 (21.2%), IVB - 17 (10.3%). 80 (48%) patients underwent hemihepatectomy, 17 (10%) - advanced hemihepatectomy, 16 (10%) - minor liver resection with common bile duct repair, 52 (32%) - common bile duct repair resection. Kaplan-Meier survival analysis was performed. Cox proportional hazard model was applied to access relationship between survival and prognostic factors. Log-rank test was used to compare both survival curves. RESULTS: R0-resection as followed by 5-year survival rate near 32%. Microvascular invasion was observed in 42.9%, lymphovascular invasion - in 88.2%, positive resection margin - in 59.2%, perineural invasion - in 83.3%, cells in surrounding fatty tissue were revealed in 92.3%. Resection may be considered radical (R0) if all variables are absent, 5-7 negative factors are followed by conditionally radical procedure (R+number of positive factors). Long-term outcomes and significance of new criteria were accessed (p=0.004). CONCLUSION: New criteria of radical procedure are presented. The last reflects the concept of dependence of 'pure' surgical edge from not only presence or absence of tumor cells in cut-off plane but also from important morphological features of tumor.

[Clinico-pathological factors and prognosis scale for portal cholangiocarcinoma]. / Kliniko-patologicheskie faktory i shkala prognoza pri vorotnoi kholangiokartsinome.

INTRODUCTION: The objective of this study was to derive a prognostic scale to predict overall survival (OS) after a curative resection of perihilar cholangiocarcinoma (PHC). MATERIAL AND METHODS: The data of 55 patients with portal cholangiocarcinoma were analysed. Patients were treated at the A.V. Vishnevsky Institute of Surgery from 2011 to 2015. Surgical treatment after biliary decompression was performed in 37 (67.3%) patients. In the long-term period we observed 36 (97.3%) of the operated patients. The dependence of the OS of clinical and pathological factors of the tumor was analysed using mono- and multifactor regression analysis of Cox proportional hazards models for all operated patients. RESULTS: Total 1-3-, 5-year survival rate was 75.1, 60.5, 37.7, 35% respectively. Significant prognostic factors (monofactorial analysis) include perineural (p=0,05) and vascular invasion (p=0,049), R1 resection (p=0,01), disease stage III or higher (p=0,03), invasion of SI liver (p=0,004), tumor cells differentiation degree (grade) 2 and higher (p=0,0006). Multifactor analysis revealed that the low OS have determined by perineural (p=0,05) and vascular invasion (p=0,008), the degree of differentiation of tumor cells (p=0,001), disease stage (p=0,05), surgical resection margin (p=0.0345). Developed method of predicting OS is a score of prognostic factors. CONCLUSION: The scale of individual prognosis in patients PHC takes into account both clinical and histopathological tumor characteristics. This scale may be useful to optimize the individual treatment.

[View on the problem of Klatskin tumor].

Klatskin tumor arises from the common hepatic duct and its bifurcation the bile ducts and is the most common primary malignancy of the biliary tree. the location of the tumor and its close relationship with vascular structures at the hepatic hilum have resulted in a low resectability and high morbidity and mortality. Improvement of instrumental diagnostics and operative techniques allows to perform extended resection and complex interventions on the liver, bile ducts and vascular structures at the hepatic hilum. The role of chemoratiotherapy and photodynamic therapy is not fully understood. thus, questions of treatment and prognosis of the disease are remain relevant and require further study.

[BILIARY DECOMPRESSION ASSOCIATED WITH TUMOURS OF PROXIMAL BILE DUCTS].

The treatment of tumours of proximal hepatic ducts (Klatskin tumours) remains a serious challenge because most patients are referred to the clinic at later stages of the disease. Its most common symptom is obstructive jaundice syndrome. Various methods of bile tract decompression have been proposed to resolve manifestations of this syndrome in the course of preoperative preparation for surgery of potentially resectable tumours and palliative treatment of incurable neoplasms. However analysis of the literature shows that the choice of an adequate method for the purpose remains a matter of debate.