[Choledochal cysts: surgical treatment in newborns and infants]. / Kisty kholedokha: osobennosti khirurgicheskogo lecheniya u detei pervykh trekh mesyatsev zhizni.

OBJECTIVE: To improve postoperative outcomes in newborns and infants with choledochal cysts and to determine the indications for surgery. MATERIAL AND METHODS: There were 13 children aged 0-3 months with choledochal cyst who underwent reconstructive surgery between 2019 and 2023. In all children, choledochal cyst was associated with cholestasis. Acholic stool was observed in almost half of the group (n=7). All children underwent cyst resection and Roux-en-Y hepaticoenterostomy. RESULTS: Symptoms of cholestasis regressed in all patients. Mean surgery time was 128±27 min. There were no complications. Enteral feeding was started after 1-2 postoperative days, abdominal drainage was removed after 6.2±1.6 days. Mean length of hospital-stay was 16±3.7 days. Adequate bile outflow is one of the main principles. For this purpose, anastomosis with intact tissues of hepatic duct should be as wide as possible. Roux-en-Y loop should be at least 40-60 cm to prevent postoperative cholangitis. CONCLUSION: Drug-resistant cholestasis syndrome and complicated choledochal cysts (cyst rupture, bile peritonitis) are indications for surgical treatment in newborns and infants. When forming Roux-en-Y hepaticoenterostomy, surgeon should totally excise abnormal tissues of the biliary tract to prevent delayed malignant transformation.

[Surgical treatment of postintubation stenosis of the larynx in children]. / Khirurgicheskoe lechenie postintubatsionnykh stenozov gortani u detei.

Post-intubation laryngeal stenosis is the most common cause of upper respiratory obstruction in children. According to published data, the incidence of post-intubation stenosis ranges from 0.1 to 20%. Treatment of children with chronic laryngeal stenosis is a special branch of respiratory surgery. It remains one of the most complex and urgent problems in pediatrics, pediatric otorhinolaryngology, and pediatric surgery. Although numerous studies have described various methods for treating stenosis of the infraglottic space, there is no standard management approach. Currently, there are two main treatment methods: endoscopic interventions and open reconstructive surgery. Each method has its benefits and drawbacks. Despite the use of various techniques, the effectiveness of cicatricial laryngeal stenosis repair and decannulation in children is 63-64%, according to published data. With combined lesions of infraglottic and vocal cord parts of the larynx, especially with their cicatricial obliteration, reconstructive surgery is successful only in 50% of cases. Thus, treating children with post-intubation respiratory stenosis remains a complex problem and is a relevant direction for further research.

[Isolated splenic lymphangioma]. / Laparoskopicheskaya rezektsiya pri izolirovannoi limfangiome selezenki.

Splenic lymphangioma is a rare malformation of splenic lymphatic channels characterized by cysts resulting from increased number of enlarged thin-walled lymphatic vessels. In our case, there were no clinical manifestations. Lymphangioma was congenital and diagnosed by ultrasound as an accidental finding. Surgery is the only method of radical treatment of splenic lymphangioma. We describe an extremely rare case of pediatric isolated splenic lymphangioma and laparoscopic resection of spleen as the most advantageous variant of surgical treatment.

[Heller laparoscopic cardiomyotomy with Douro fundoplication - a standard for the treatment of cardiac achalasia in children]. / Laparoskopicheskaya kardiomiotomiya po Gelleru s fundoplikatsiei po Doru ­ standart lecheniya akhalazii kardii u detei.

OBJECTIVE: To analyze 20-year experience in surgical treatment of cardiac achalasia. MATERIAL AND METHODS: A retrospective analysis included 35 children (20 boys and 15 girls) who underwent surgical treatment of cardiac achalasia at the Filatov Children's Clinical Hospital No. 13 for the period 2001-2020. RESULTS: Heller laparoscopic cardiomyotomy with Douro fundoplication was followed by favorable outcomes in 33 (94.3%) children. We also observed significant decrease of postoperative Eckardt score compared to baseline values. CONCLUSION: Methods of cardiodilation (balloon dilatation, bougienage) ensure a short-term effect and may be only used in addition to surgical treatment. Heller laparoscopic cardiomyotomy with Douro fundoplication results favorable outcome in more than 92% of patients and can be considered as a standard for the treatment of this disease in children. Oral endoscopic myotomy cannot be considered as an alternative to Heller laparoscopic cardiomyotomy with Douro fundoplication due to high risk of secondary gastroesophageal reflux and its complications. Therefore, additional fundoplication is required that makes treatment of cardiac achalasia more invasive and expensive compared to Heller laparoscopic cardiomyotomy with Douro fundoplication.

[Minimally Invasive Technologies in Surgery of the Chest Wall in Children].

Today, in our country, as well as throughout the world, there is no single approach to the tactics of managing patients with deformations of the anterior chest wall. These patients constitute a large and heterogeneous group. The team acquired great experience in treating children with pectus excavatum and pectus carinatum, as well as a unique experience in the surgical treatment of pediatric thoracic outlet syndrome and sternum clefts. Now in the world there are a lot of surgical methods used for the correction of congenital deformities of the chest wall, however, the majority of them are extremely traumatic for the patient, and the postoperative scar often presents a minor cosmetic problem than the deformation itself. In addition, almost all methods require the use of expensive technologies, the patient's long hospital stay and the use of potent drugs. As for the children with thoracic outlet syndrome and sternum clefts, these patients are extremely difficult in terms of timely diagnosis and surgical care, due to the fact that pediatric surgeons and pediatricians are very little aware of this pathology. The team of authors developed a number of techniques, based on the collaborative work of surgeons, anesthesiology and resuscitation specialists and pediatric services. They resulted in successful surgical correction of these malformations and gave patients the opportunity to lead a normal life.

[Complications and long-term results of delayed esophagoezophagostomy for esophageal atresia]. / Oslozhneniia i otdalennye rezul'taty otsrochennogo ézofago-ézofagoanastomoza pri atrezii pishchevoda u detei.

AIM: To evaluate complications and long-term results of delayed esophagoesophagostomy in children with esophageal atresia (EA). MATERIAL AND METHODS: 165 EA children were operated at the Filatov Municipal Children's Hospital #13 for the period 2006-2016. Primary esophageal anastomosis was performed in 136 (82.4%) children with tracheoesophageal fistula. In 5 (3%) neonates with non-fistulous EA esophago- and gastrostomy were made for further coloesophagoplasty. Other 24 (14.5%) children underwent gastrostomy for delayed esophagoesophagostomy. 6 (25%) of them died within 12 days after admission. 18 survivors with gastrostomy subsequently underwent delayed esophagoesophagostomy. RESULTS: Postoperative complications occurred in 16 (88.9%) children. Esophageal anastomosis failure occurred in 4 (22.2%) patients, stenosis of anastomosis in 11 (61.1%) children, gastroesophageal reflux in 14 (77.8%) children. Early postoperative mortality was 16.7% (3 children). In remote period 92.3% of children were not adapted to normal diet and only in 7.7% of patients eating behavior corresponds to the age. 11 children underwent prolonged esophageal bougienage. 9 children underwent re-operation after delayed anastomosis. Esophageal extirpation was made in 4 children. CONCLUSION: Esophago- and gastrostomy provides 100% survival if primary esophageal anastomosis is impossible. Herewith, in children without esophagostomy mortality rate was 25%. We still can not confirm that delayed esophageal anastomosis is a good alternative for children with esophageal atresia. In view of our results the number of candidates for delayed esophageal anastomosis should be reduced.

[Sliding traсheal plasty in children under extracorporeal membrane oxygenation (first experience in Russia)].

AIM: To improve the results of surgical treatment of children with extended tracheal stenosis. MATERIAL AND METHODS: Since 2013 slidingtraсheal plasty under extracorporeal membrane oxygenation was performed in 4 children aged 1 year 2 months - 4.5 years with extended tracheal stenosis in Children's City Clinical Hospital №13. Patients' weight was from 10,5 to 16 kg. Extended tracheal stenosis and complete cartilag inousrings were confirmed in all patients after peoperative survey. Indications for surgery were based on medical history data, the severity of respiratory failure and survey data. Sliding traсheal plasty by different approach esunder extracorporeal membrane oxygenation was applied in all patients. RESULTS: There were no intraoperative complications. In the study group 1 patient died in remote postoperative period after discharge due to deterioration of his condition caused by upper respiratory tract infection and acute respiratory failure. In immediate postoperative period 1 patient had pronounced growth of granulation tissue in the area of anastomosis followed laser photocoagulation and prolonged intubation. The average ICU-stay was 24 days, the duration of mechanical ventilation - 11 days. Follow-up carefor patients was conducted on terms of 4-6 and 12 months after surgery. In 2 patients moderate complaints of recurrent bronchitis without signs of respiratory insufficiency during 6-8 months postoperatively were observed. In one child complaints were completely absent.

[Thoracoscopic operations for neurogenic tumors in children].

AIM: To present an overall experience of endoscopic operations in children with neurogenic tumors in two medical institutions. MATERIAL AND METHODS: Thoracoscopic excision of tumors was performed in 19 children aged 1 month-7.5 years (mean 1.5 years) in two clinics for the period 2010-2014. In 9 children (47.3%) age did not exceed 1 year. In our study ganglioneuroma was diagnosed in 9 cases, ganglioneuroblastoma--in 2 patients, neuroblastoma stage I--in 8 cases. All patients were under observation and treated according to NB2004 protocol. Tumor's diameter ranged from 1 to 6 cm (mean 4.9±1.9 cm). Mean duration of surgery was 62±22 minutes. There were no any intraoperative complications. Early postoperative period in all patients after endoscopic surgery was more favorable than in those after open operations. Any local recurrences were not observed for the follow-up period. RESULTS: Thoracoscopic operations can become more preferable method in treatment of children with neurogenic tumors if great vessels are not involved into neoplastic process and limited volume of tumor is absent.

[Thoracoscopic lung resection in children].

The spectrum of pulmonary surgical pathology in newborns and infants is mainly presented by congenital diseases. Surgery is the main radical method of treatment of children with congenital lung diseases. By this time in the N.F.Filatov City Children's Hospital No13 it is performed more than 1000 endoscopic operations on the thoracic cavity including more than 300 lung resections. More than 190 cases were caused by congenital lung disease. The results of treatment of 194 infants with congenital lung disease for the period 2005-2014 are analyzed in this article. 14 (22%) patients were operated urgently. 8 patients (12%) with compensated respiratory failure underwent surgery at the age of 8 to 46 days. Children with absence of clinical manifestations underwent thoracoscopic lung resection at the age of 3 to 8 months. Thoracoscopic lobectomy was performed in the 40 cases (62%). There were no intraoperative complications. Thoracoscopic lung resection for malformations in newborns and infants is currently the method of choice. It allows to visualize pathological focus intraoperatively and to perform precise dissection of pulmonary root structures using modern equipment. Thus, it improves course of postoperative period and reduces duration of hospital-stay. Repeated lung resection in patients with recurrent tuberculosis of operated lung (literature review and own data).

[Thoracoscopic thymectomy in children by myasthenia gravis].

The authors' experience of surgical treatment of myasthenia gravis in children was analyzed. 32 patients were operated on, mean age was 13±3 (5-21 years); girls were 26, boys were 6 (19%). Disease severity was IIB-IVB by the MGFA classification, all patients were on anticholinesterase and pednisolone therapy. The operation was indicated by certified neurologists, specialized in myasthenia. All patient were thoracoscopically thymectomized using left- or rightside access. There were no conversions and intraoperative complications. The operation duration was 77±23 min. The postoperative hospital stay was 6.6±3.6 (3-9) days. Excellent long-term results were achieved in 6 (25%) patients, good - in 20 (62.5%) children, no changes were registered in 2 and deterioration of myasthenia in 2 (6.25%) patients. The study proved that thoracoscopic thymectomy obtains the radicalism of open technique, proposing the easier postoperative period and being the method of choice for the surgical treatment of myasthenia gravis in children.

[Early results of thoracoscopic treatment of inborn and acquired lung diseases in children].

Thoracoscopic and traditional methods of treatment of the inborn and acquired lung diseases in children were comparatively analyzed. The main group, operated on thoracoscopically, consisted of 30 patients. The control group, operated on thoracotomically, consisted of the same number of children. Both groups were comparable to the age, gender, diagnostic algorithm, risk and preoperative prepare. Traumaticity of the operation and postoperative period were assessed. Thoracoscopic method proved to have indisputable advantages.

[The endoscopic operations by solid thoracic tumors in children].

20 patients were operated thoracoscopically on the cause of the solid tumors of the pleural cavity. Patients were aged from 1 day of life to 17 years. Minimal size of the tumor was 3.1×3.5×4.0 sm; maximal 10×10×20 sm. The control group was created of 22 children with thoracic tumors, operated via thoracotomy. The postoperative period and outcomes were statistically better among patients, treated thoracoscopically.

[Thoracoplasty by pectus carinatum in children].

91 children were operated on pectus carinatum. Patients were aged 9-15 years. Thoracoplasty by Ravich was performed in 32 children (the first group) and 59 patients were operated using the method of thoracoplasty, modified by the authors. The major features were: transverse skin incision not longer than 8 sm, mobilization of the skin, subcutaneous fat and pectoral muscles en block, bilateral subperichondral resection of the deformated ribs, resection of the most deformated part of the sternal body (up to 2.0-2.5 sm) and suturing the fragments end-to-end. The long-term follow-up results were studied in term from 6 months to 5 years. The comparative analysis of the results demonstrated obvious advantages of the author's method of thoracoplasty.

[Laparoscopic reconstructive surgery by biliary tract malformations in children].

Treatment results of 18 children operated on various biliary tract malformations were analyzed. Laparoscopic portoenteroanastomosis by Kasai was performed in 10 patients with biliary atresia aged from 10 days to 3,5 months. Average weight of the operated children was 3640 +/- 124 g. 8 patients aged from 2 to 15 years operated on cystic common bile duct malformation. Laparoscopic dissection of cystic deformated biliary ducts with Roux-en-Y hepaticoenterostomy was performed in these cases. 5 troacars were used for both operations. First stage of portoenteroanastomosis formation represented of laparoscopic portal fibrous plate separation. By cystic common bile duct malformations, altered bile ducts were dissected. The second stage--Roux-en-Y enteroenteroanastomosis--was performed through a paraumbilical microincision. Portal anastomosis or common bile duct anastomosis was performed also laparoscopically. Recovery of patients was observed in all cases. Early postoperative course demonstrated a low invasiveness of the method. Thus, laparoscopic access can become a method of choice in treatment of biliary tract malformations in children.

[Laparoscopic cardiomyotomy for the treatment of achalasia of esophagus in children].

The experience of endosurgical treatment of 8 children, aged from 4 to 15 years, with cardiac achalasia was analyzed. Laparoscopic Heller's cardiomyotomy with gastropexy was performed in all cases. Esophageal mucosa was damaged in 2 patients. The lesion was closed laparoscopically, there were no conversions. Esophageal perforation was registered postoperatively in one patient. The study shows capabilities of endoscopic surgery in treatment of rare esophageal diseases in children.

[Endoscopic lung resection in children].

The experience of thoracic surgery department of a pediatric hospital Number13 is revised. The evolution of operative methods in minimally invasive thoracic surgery and most frequently used procedures in children lung surgery are described. The results of 26 thoracoscopic lung resections on account of inherited and acquired diseases are described. Actual problems of thoracoscopic surgery are discussed.

[Mini-laparoscopic fundoplication by Nissen in the treatment of gastroesophageal reflux at children].

Results of surgical treatment of 180 children with gastroesophageal reflux are analyzed. Laparoscopic fundoplication by Nissen was used. Positive result was achieved in all the cases, there were no lethal outcomes. Mean time of surgery was 64.4+/-30.2 min, mean hospital stay after operation--4.7+/-1.5 days. It is concluded that laparoscopic fundoplication may be performed at children irrespective of age and body mass, including at the patients with malformations and recurrence of disease.

[Immunotropic treatment of patients with surgical treatment of the gastrointestinal tract].

Results of examination of systemic immunity state, microbiocenosis and immunohistological changes of tissues of the esophagus and stomach in 37 adult patients and 69 children with erosive-ulcerous diseases of the gastrointestinal tract were analyzed. Based on these examinations, up-to-date immunomodulator tamerit inhibiting pathologic activity of monocytes/macrophage system with simultaneous activation of neutrophil granulocytes was used in 154 adult patients and 69 children. Positive result was achieved in all the cases when tamerit was used.

[Treatment policy for children with gastroesophageal reflux complicated by Barrett esophagus]. / Taktika lecheniia detei s gastroézofageal'nym refliuksom, oslozhnennym pishchevodom Barretta.

Barret's esophagus (BE) is a rare disease in children. It is caused by gastroesophageal reflux (GER). From 1996 to 1999 seventy-eighth children with GER were treated. Twenty-four-hour pH-metry and manometry of the esophagus, scintigraphy and contrast roentgenoscopy of the esophagus were used for diagnosis of GER. All the children underwent biopsy of mucosa membrane of distal esophagus. Morphologic examinations revealed BE in 16 (20.5%) children. Metaplasia of esophageal epithelium by intestinal type (IT) in combination with one by gastric type (GT) were revealed in 8 children, metaplasia by gastric type alone (epithelium of gastric and fundal parts of the stomach)--in 8 children. Six children with IT metaplasia of the esophagus with long strictures underwent extirpation of the esophagus with one-stage esophagoplasty. It esophageal stenosis is not long or is absent, fundoplication by Nissen (4 children) and drug therapy (6 children) are performed. It is concluded that in IT metaplasia of the esophagus with long peptic esophageal strictures resistant to bouginage extirpation of the esophagus with one-stage coloesophagoplasty is desirable. Other methods of treatment do not exclude probability of esophageal adenocarcinoma. These children should be followed up with esophageal biopsy each 6-12 months.