Introduction Peutz-Jeghers syndrome (PJS) is an autosomal dominant hereditary hamartomatous polyposis with predominant localization in the jejunum and ileum and high risk of bowel perforation after traditional polypectomy. The modern enteroscopy is the only possible technique for visualizing and performing intraluminal endoscopic microsurgical manipulations in the deep sections of the small intestine. The study aims to develop an optimal method for the diagnosis and treatment of polyps in children with PJS. Materials and Methods During 2015 to 2018 we conducted 30 comprehensive examinations of children with PJS in The Department of Endoscopic Research of the National Medical Research Center for Children's Health. We performed esophagogastroduodenoscopy and colonoscopy with removal of polyps more than 7 mm, then video capsule endoscopy and, guided by this, therapeutic single-balloon enteroscopy. Our technique for removal of polyps is general in all parts: (1) creating a “resistant pillow”; (2) electroexcision of polyp; (3) clipping the removal site. Results Successfully performed electroexcision of polyps, which were located in the deep parts of the small intestine at a distance of 30 segments (one segment is 10 cm), reached a diameter of 2.5 cm, had a long pedicle. The postoperative period was uneventful. Conclusion We have developed an optimal method of diagnostic and therapeutic measures, the observance of which allows us to avoid delayed perforations of the small intestine in the area of polypectomy in the postoperative period in children with PJS. Thanks to this technique, modern enteroscopy is becoming the only possible alternative to bowel resection in children with PJS.

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Peutz-Jeghers syndrome (PJS) is an autosomal dominant hereditary hamartomatous polyposis with predominant localization in the jejunum and ileum. Because of PJS polyps differ from adenomatous ones, the performing polypectomy is associated with a high risk of bowel perforation. During 2015-2017 18 PJS children were comprehensively examined including esophagogastroduodenoscopy, colonoscopy, and video capsule endoscopy There was developed a step-by-step procedure for the removal of polyps common in all parts of the small intestine, including the creation of a “persistent pillow”; electroexcision of a polyp and application of a clip to the region of the womb of a removed polyp. Polyps more than 7 mm detected in the stomach and duodenum, were removed during endogastroduodenoscopy, and in the colon - under a colonoscopy. During video capsular endoscopy, polyps with a diameter of 2 mm to 2.5 cm were detected in the deep parts of the small intestine. For their surgical removal, during a therapeutic single-balloon enteroscopy, an electroscission of all polyps was performed. The postoperative period was uneventful. The combination of a single balloon enteroscopy with an electroexcision of polyps is suggested by the authors as the optimal method for the diagnosis and treatment of PJS in children, which allows avoiding delayed perforations of the small intestine in the postoperative period. Thanks to this technique, enteroscopy becomes the only possible alternative to bowel resection in PJS children.

Introduction. One of the most common drugs for maintaining pregnancy is exogenous progesterone. With the expansion of the indications for its use during pregnancy, the number of complications associated with it may increase. Material and methods. The article presents the results of a prospective study of medical records of pregnant women, which were observed in the V.F. Snegirev Obstetrics and Gynecology Clinic in 2017 and received exogenous progesterone therapy. Results. The dynamics of changes in the studied biochemical parameters was multidirectional in the main and control groups. According to pregnancy outcomes, statistically significant differences between the groups were not found. Conclusions. Critical abnormalities of the main biochemical parameters in pregnant women of the main group were not detected. Preparations of the gestagen series in appropriate dosages do not significantly affect the main indicators of the hepatobiliary system and pregnancy outcomes, so their use is permissible under the control of laboratory parameters.

A review of world literature was conducted in the databases Scopus, Web of Science, MedLine, Cochrane CENTRAL, Cochrane Database of Systematic Reviews (CDSR), Database of Abstracts of Reviews of Effectiveness (DARE), EMBASE, Global Health, CyberLeninka, RSCI on the problem of the effect of combined oral contraceptives (COCs) and hormone therapy during assisted reproductive technologies on the function of the hemostatic system in non-pregnant and pregnant women. The scientific concept of this work is different in that we have summarized and analyzed information on the effect of sex hormones entering the woman’s body from the outside on individual links and the hemostatic system as a whole, determined the relationship between drug administration and thrombotic complications, optimized the sequence of diagnosis of conditions predisposing to thrombosis. The scientific novelty of this work is that we have compared the effects of COCs and hormonal changes during pregnancy on the hemostatic system and found that changes in the hemostatic system in women taking COCs are similar to those that occur during pregnancy.