Endoscopy nurse in a unique specialist in healthcare, combining duties of routine nurse work and professional assistance for doctors in performing high-technology endoscopic examinations and treatment procedures with modern endoscopic equipment. For now, endoscopy is not only routine examinations of upper and lower GI tract. Novel endoscopy is fast evolving with modern technologies, such as high definition narrow-band imaging, confocal laser endomicroscopy and endocytoscopy, providing up to 1000 times magnification of mucosa. Moreover, endoscopic treatment procedures - endoscopic mucosal resection, submucosal dissection, endoscopic stenting and many more are widely used for treatment of early cancers and palliative care. Endoscopic nurse assists physician in all these examinations and procedures. Furthermore, in some countries, endoscopy nurse performs easy endoscopic examinations by herself. In most countries, but not in Russia, endoscopic equipment reprocessing performed by dedicated technical staff, not by endoscopy nurse. Unfortunately, in Russian Federation, in compare to other countries, there is no endoscopy nurse certification or professional guidelines.

Anal cancer is a rare malignancy of the distal gastrointestinal tract, often associated with human papillomavirus, the most common sexually transmitted infection worldwide. Currently available screening methods for anal intraepithelial neoplasia, a precursor for anal cancer, combine anal Papanicolaou cytology and high resolution anoscopy with biopsy of suspicious lesions. It is well known that the anal canal is an area examined by proctologists, however, with endoscopic examination, cancer of the anal canal can also be detected, including in the early stages of the tumor process. When conducting an endoscopic examination of the lower gastrointestinal tract, the most common cause of incomplete examination of the colon during colonoscopy is poor preparation, less often—the anatomical features of the colon. An endoscopist, who examined the colon often skip the changes related to the lower ampullar part of the rectum and the anal canal, because of quickly removing the endoscope and not using the technique of examining this area in retrofl exed mode. This review describes the epidemiology of anal intraepithelial neoplasia and anal cancer and carcinogenesis in the population of the Russian Federation, presents an algorithm for examining patients at risk, diagnostic and therapeutic endoscopic techniques that allow timely diagnosis of pathological conditions of the lower ampulla of the rectum and anal canal, also presents modern possibilities of endoscopic treatment of this pathology.

Introduction. Stenting in the ileocecal region is not a routine procedure. Proximal colonic obstruction is generally managed with primary surgery, although there are no RCTs to support this assumption. Recent reports have shown that emergency right colon resection can be associated with high morbidity and mortality rates. We report about 8 cases of obstructive ileocecal cancer for palliative treatment. Case report. Four men and 4 women (mean age, 69 years; range, 62–82 years) were stenting for obstructive ileocecal cancer between September 2014 and December 2019. Emergency SEMS placement was attempted in the remaining 5 cases. An uncovered colonic stent (S&G Biotech; Boston Scientifi c) 22, 24, 25 mm in diameter, 6, 8or 9cm in length, was used. Clinical success is achieved in all cases. One patient was diagnosed with stent migration 4 weeks after stenting, and repeated stenting was performed. Five patients received chemotherapy after stenting, two patients refused further treatment. Discussion. Placing SEMS for ileocecal obstruction is technically challenging for the following reasons. The long distance from the anus, tortuosity of the bowel and angled anatomy of stricture make an ileocecal lesion difficult to reach endoscopically. SEMS can be an alternative to emergency surgery for obstruction due to right colon cancer. In our study, we had migration in 1 case, no perforations or stent ingrown were detected. Conclusion. Stenting for malignant tumors of the ileocecal region, complicated by intestinal obstruction is an eff ective and safe minimally invasive intervention, and can be used as an alternative to emergency surgery.

Foreign bodies in the respiratory tract are rare in adults. Clinical manifestations include hemoptysis among other signs which requires the examination to detect tuberculosis and lung cancer. The article describes a clinical case that demonstrates the possibilities of endoscopic diagnostics and treatment in the patient with an X-ray negative foreign body (a cigarette filter) that has been in the lumen of the upper lobar bronchus of the right lung for a long time which caused inflammation in the blocked lobe and mimicking endoscopically central lung cancer.

Majority of published data describing endocytoscopic examination of upper gastrointestinal tract mucosa, but in recent publications, it is reported, that endocytoscopy is suitable for small bowel, colon, respiratory tract and even peritoneum «optical biopsy». In number of articles possibilities of celiac sprue diagnostics with endocytoscopy is dicscussed, but small-bowel endocytoscopy is limited, due to absence of endocytoscopes, compatible with enteroscopes. More widely endocytoscopy is used in colon, mostly in lateral-spreading adenomas diagnostics. Prof. S-E. Kudo developed endocytoscopic classification of colonic mucosa changes, used for differential diagnostics and lesion mapping, describing hyperplasia, adenomas with different grades of intraepithelial neoplasia, non-invasive and invasive cancer. Some authors reported about good possibilities of endocytoscopy in inflammatory bowel disease diagnostics. Most of data, related to respiratory tract endocytoscopic examination, focused on precancerous conditions and early pharyngeal and lung cancer, and the preliminary results are promising, but, unfortunately, for now, endocytoscopy in bronchial tree is limited, due to lack of thin endocytoscopes. According to some article data, it is possible to use endocytoscopy not only in gastrointestinal and respiratory tract, but also in optical confirmation of peritoneal tumor dissemination in gastric and ovarian cancer patients, and - in bladder mucosa examination

Objective: the aim of study was testing and introduction in clinical practice combination of EUS with sonoelastography, fine-needle biopsy and needle-based confocal laser endomicroscopy in advanced diagnostic of pancreatic disease. Materials and methods: in the period from February 2014 to December 2015, we accumulated experience of EUS-FNA in 72 patients mostly with tumor pathology of the pancreas. In 16 cases we used 19G, in 49-22G, and in 7 patients - 25G needles. In 5 patients we used COOK Echotip Procore needle. In 8 cases we performed confocal laser endomicroscopy through the 19G needle (nCLE) in 3 patients with cystic and in 5 - with solid tumors. In 20 patients, there we used HITACHI-PENTAX sonoelastography was performed. Results: There were no complications in EUS-FNA. In all cases we received pathology verification of disease. nCLE results always confirmed by morphological examination of material. In elastography examination normal pancreatic tissue had a equable green-yellow color, in chronic pancreatitis on the same background there were areas of blue seal parenchyma, in the cases pancreatic adenocarcinoma it was marked predominance of blue color scale, in neuroendocrine tumors - diffuse distribution of green and blue areas. Using nCLE in patients with adenocarcinoma revealed the destruction of certain glands, polymorphic nuclei of epithelial cells, with their enlargement, deformation, loss of polarity. Appliance of Procore needle has its technical features, but allowed us to obtain more material with less bloody - due to fewer number of passes. Conclusion: Thus, our study confirms the effectiveness of EUS-FNA with sonoelastography and nCLE. It defines objectives for improvement and expansion of the range for their clinical use.

OBJECTIVE:Implementation into clinical practice and getting our own data of the effectiveness of EUS-CPN in chronic pain syndrome associated with pancreatic cancer in the palliative treatment.MATERIALS AND METHODS:In the period from October 2014 to May 2015 in P.A. Herzen Moscow Research Oncological Institute--filial FGBI "NMIRC" gained the first clinical experience in the celiac plexus blockade under endoscopic ultrasound navigation in 10 patients with pain associated with pancreatic cancer. The study group included 6 women and 4 men aged 54-83 years. In 2 of 10 cases out celiac ganglia were located and injections made in side them. In eight cases, the blockade was performed after injection into the tissue surrounding the celiac trunk. In most cases, we used standard FNA-needle with diameter 22G. Blockade performed by a combination of local anesthetic (3-4 ml of 0.5% bupivacaine) and 14-20 ml of 96% ethanol.RESULTS:There were no complications after EUS-BCS. 9 of 10 patients (90%) had a significant (2-4 points on a visual analogue scale) reduction of pain after 1-3 days after the procedure. These patients had a significant reduction in the frequency and dosage of analgesics. Four patients required repeat of anesthesia after 2 months--the same with a marked positive effect. One patient, in spite of the double execution of EUS-CPN did not note reduction in pain intensity.CONCLUSION:EUS-CPN procedure is highly effective, very simple and safe. It provides a high quality of life and of social adaptation oncology patients. It should be more widely used in clinical practice.

Majority of published data describing endocytoscopic examination of upper gastrointestinal tract mucosa, but in recent publications, it is reported, that endocytoscopy is suitable for small bowel, colon, respiratory tract and even peritoneum "optical biopsy". In number of articles possibilities of celiac sprue diagnostics with endocytoscopy is discussed, but small-bowel endocytoscopy is limited, due to absence of endocytoscopes, compatible with enteroscopes. More widely endocytoscopy is used in colon, mostly in lateral-spreading adenomas diagnostics. Prof. S-E. Kudo developed endocytoscopic classification of colonic mucosa changes, used for differential diagnostics and lesion mapping, describing hyperplasia, adenomas with different grades of intraepithelial neoplasia, non-invasive and invasive cancer. Some authors reported about good possibilities of endocytoscopy in inflammatory bowel disease diagnostics. Most of data, related to respiratory tract endocytoscopic examination, focused on precancerous conditions and early pharyngeal and lung cancer, and the preliminary results are promising, but, unfortunately, for now, endocytoscopy in bronchial tree is limited, due to lack of thin endocytoscopes. According to some article data, it is possible to use endocytoscopy not only in gastrointestinal and respiratory tract, but also in optical confirmation of peritoneal tumor dissemination in gastric and ovarian cancer patients, and--in bladder mucosa examination.

Endocytoscopy is one of the most novel endoscopic diagnostic procedures, providing optical magnification up to 1150 times of gastrointestinal and respiratory tract mucosa. Such approach allows real-time tissue and cellular structure visualization. Endocytoscopy, along with confocal laser endomicroscopy, can be considered as "optical biopsy" in vivo. Of course, endocytoscopy currently is experimental diagnostic method, all available endocytoscopes are prototypes. According to published data, endocytoscopy can be used in precancerous conditions and early intramucosal cancer diagnostics in esophagus, stomach, colon and bronchial tree. Different types of endocytoscopes are used for examinations: some of them are baby-scopes, with fixed magnification 570-1150 times, introduced into accessory channel of the therapeutic parent-endoscope, others--are integrated type, providing scalable magnification from 80 to 380 times. As for traditional pathology ex vivo, for endocytoscopy mucosal cell nuclei stain is needed. For vital staining during endocytoscopy methylene blue, toluidine blue and crystal violet in different concentrations are more often used. In cases of squamous-cell dysplasia or cancer, it is recommended to use 1% methylene blue solution, whereas in intestinal type metaplasia, dysplastic changes and cancer (Barrett's esophagus, P. Correa precancerous cascade, colon adenomas), 1% toluidine blue is preferred. With endocytoscopy, after vital staining, we can visualize and estimate mucosa tissue and cell characteristics: papillae, crypt and gland shapes and sizes, their integrity (tissue markers); cell nuclei size and shape, polarity and nuclear dye intensity (cell markers).

OBJECTIVE:to define the optimal approach for self-expanding metal stents (SEMS) installing in the cervical esophagus in cases of malignant stenosis and to select the optimal types of stents for this tumor location.MATERIALS:From 2004 to 2013 in P.A. Herzen Moscow Cancer Research Institute in 24 patients with cervical esophagus tumor stenosis endoscopic stenting was performed. 70% of installed stents were Choo Cervical (M.I. Tech, Korea), 13%--unspecialized Choo and Hanaro stents (M.I. Tech, Korea), and 17%--Gianturco-Z stents (Wilson-Cook, Ireland). Main contraindication for cervical esophagus stenting was location of the tumor margin less than 1 cm from the upper esophageal sphincter. In 21% of cases, endoscopic stenting was performed under combined fluoro- and endoscopic guidance, in 79%-- using only endoscopic approach.RESULTS:Technical success of stent placement was achieved in all patients; SEMS was installed at the previously defined level. The accuracy of stenting was not depended from the type of guidance procedure. The most intensive pain was observed in cases with "not specialized" stents with diameter of 18, 20 or 22 mm. Average pain level in such patients was 4.54 points (VAS). In the subgroup with "cervical" stents average pain intensity was not exceed 3 points. Chronic pain syndrome lasts lifelong in 17% of patients.CONCLUSION:The procedure of SEMS positioning under endoscopic guidance with individual selection of stent type allows restoring oral nutrition in patients with severe tumor stenosis of the cervical esophagus.

A case of multiple course of photodynamic therapy (PDT) in patient with gastric cancer T 1 N 0 M 0 . Morpholological diagnosis in this patient was signet ring cell cancer. For 8 years the patient underwent endoscopic organ-sparing treatment: PDT with Photohem (17 courses), electrocoagulation of tumor (3 sessions). The drug Photohem was introduced intravenously at dose of 3.0 mg/kg body weight for 48 h before PDT. The treatment result was only partial regression of gastric tumor, the maximal follow-up period with no endoscopic and morphological signs of tumor growth accounted for 8 months. However besides incomplete removal of gastric tumor and morphological type, for check-up examination 8 years after the onset of endoscopic treatment there were no features of regional and distant metastases according to chest and abdominal CT and US.

A case of multiple course of photodynamic therapy (PDT) in patient with gastric cancer T1N0M0. Morpholological diagnosis in this patient was signet ring cell cancer. For 8 years the patient underwent endoscopic organ-sparing treatment: PDT with Photohem (17 courses), electrocoagulation of tumor (3 sessions). The drug Photohem was introduced intravenously at dose of 3.0 mg/kg body weight for 48 h before PDT. The treatment result was only partial regression of gastric tumor, the maximal follow-up period with no endoscopic and morphological signs of tumor growth accounted for 8 months. However besides incomplete removal of gastric tumor and morphological type, for check-up examination 8 years after the onset of endoscopic treatment there were no features of regional and distant metastases according to chest and abdominal CT and US.

AIMTo develop endomicroscopic criteria of early gastric cancer and precancerous conditionsMETHODS157 suspected for early gastric cancer patients were included in our study. In all cases complex endoscopic examination (narrow-band imaging NBI-HD endoscopy, endosonography (EUS) and endoscope-based confocal laser endomicroscopy (CLE) with precise biopsy) was performed. CLE images compared to pathology data.RESULTSPrecise criteria of intestinal metaplasia in CLE was presence of oval gray goblet cells in epithelium. Gastric adenoma with moderate dysplasia appeared on CLE images as glandular structures in mucosa surface layers. The signs of high-grade dysplastic changes in adenoma were appearing of different shape and size cells with lost polarity. Well-differentiated carcinoma featured destruction of some glands and forming dark cell clusters. Revealed criteria of poor-differentiated carcinoma was total disintegration of glandular structures. Overall accuracy of CLE in early gastric cancer and precancerous conditions diagnostics reached 95,6% (P < 0.001). Selected accuracy in different condition was: 100% in intestinal metaplasia identifying, 86.1%--in adenoma with moderate dysplasia, 96.2% in high-grade dysplasia and cancer in situ, and 100%--in poor-differentiated gastric carcinoma types).CONCLUSIONAs the result of our study we have developed precise endomicroscopic criteria of intestinal metaplasia in stomach, gastric adenoma with moderate and high-grade dysplasia and early gastric cancer--as well-differentiated, as poor-differentiated.