[Neurosurgeon training: current problems and modern approaches]. / Obuchenie neirokhirurga: aktual'nye problemy i sovremennye podkhody.

Analysis of historical and modern approaches to teaching neurosurgery by professional communities and public authorities in the United States, the European Union and the Russian Federation makes it possible to develop a modern training program regarding content and duration. High-tech and dynamically developing specialty has acquired several large sub-specializations over the past decades. Each direction requires a long-term training and a special program. Training in neurosurgery in the modern world takes 5-7 years and involves acquisition of clinical and scientific knowledge. Some issues are brought up for discussion by professional community. Solution of these problems will provide an opportunity for international integration of the Russian training program for neurosurgeons. High level of neurosurgery in our country and a single educational space with the European community will allow exchanging students, adopting foreign experience and sharing our own experience.

[Biological features and long-term results of comprehensive treatment of brain tumors in infants].

UNLABELLED: Complete removal is the treatment standard for most brain tumors. Outcomes of subsequent comprehensive treatment depend on biological features, the histological structure of the tumor, and radicality of surgery. The aim of this work was to study the morphological features of brain tumors in infants and to analyze long-term outcomes of surgical and comprehensive treatment. MATERIAL AND METHODS: The study included 80 infants with brain tumors aged from 1 to 12 months who had been operated on at the Burdenko Neurosurgical Institute during the period from 2000 to 2010. RESULTS: Maximal radicality was achieved in the group of tumors of the lateral and third ventricles (85%), in the group of tumors of hemispheric localization (82%), and in the group of tumors of the posterior fossa (83%). The lowest percentage of radical tumor removal (15%) accrued to tumors of the chiasmosellar area, most of which were large visual pathway gliomas. The overall five-year survival rate associated with the treatment in the studied series of patients was 92 and 48% for Grade I-II and Grade III-IV tumors, respectively. CONCLUSION: The features of biology of brain tumors in infants include the increased proliferative activity (high Ki-67 index of 10% and higher) revealed at the diagnosis of choroid papillomas, a series of pilocytic astrocytomas of the chiasm and Grade III astrocytomas, which do not affect the clinical course. The best long-term results of the treatment were obtained in infants with complete resection of Grade I and III astrocytomas and in infants with choroid papillomas. Radical removal of such histological forms as anaplastic astrocytoma, choroidal carcinoma, and anaplastic ependymoma improves the prognosis, provides favorable conditions for adjuvant therapy, and increases the period of progression-free survival in infants.

[Migrating choroid plexus papilloma of the lateral ventricle in infant--modern approaches to surgical treatment].

Choroid plexus papilloma (CPP) are rare in adults and accounted for only 0.4-1% of all intracranial tumors and even though found in all age groups, it is first of all a pediatric tumor--in children of the first year of life they account for 12-14% of all brain tumors. The preferential localization of CPP--lateral ventricles of the brain. Our paper describes a rare case of an infant with a "migrating" choroid plexus papilloma of the lateral ventricle and reviews modern approaches to surgical treatment.

[Blood loss in surgery of brain tumors in infants].

Functional immaturity of all organs and systems result in a high risk of complications in surgery of brain tumors in infants. One of the most serious complications is a massive blood loss and developing on its background severe disorders of hemostasis. In modern series of observations perioperative mortality in these children varies from 13 to 33%. The purpose of this paper--based on an analysis of topography, morphology and features of the operations to determine risk groups of blood loss in surgery of brain tumors in infants and suggest the best options for surgical tactics. When operating blood loss exceed 300% of the calculated blood volume persistent violations of coagulation homeostasis develop, which can lead to uncontrolled bleeding and death on the operating table, or post-operative bleeding. Intraoperative blood loss could be reduced by surgical techniques improvement, as well as by improving of anesthesia. First type includes preoperative embolization of the afferent vessels, careful planning of surgical approach, including using neuronavigation, deep stromal tumor coagulation during debulking, primary coagulation of main feeding blood vessels, two-stage surgery, and optimization of speed of tumor removal. All these methods has reduced the overall operational and post-operative mortality rate from 13 to 5%.

[Glioneuronal tumor with neuropil-like islands in a neonate]. / Glioneironal'naia opukhol' s uchastkami neiropilia u rebenka grudnogo vozrasta.

Glioneuronal tumor with neuropil-like islands - GTNI is a rare histopatological subtype of anaplastic astrocytoma. English-language literature contains only 43 observations, among them only 4 observations in children up to 18 years. Neuropil is an eosinophilic stained a cellular foci of tumor tissue. These cells demonstrate less proliferation activity than prevailing glial component, which is characterized by a high degree of atypia - Gr III according to WHO classification. Single reports about verification of the glioneuronal tumor with neuropil-like islands in children are supplemented with an observation of the case with tumor, located in lateral ventricular in infant with the onset of hypertension symptoms at the age of 11 months. The potential for complete removal of these tumors despite its large size and young age of the child is presented. However, the prognosis in infants with GTNI despite completeness of removal and chemotherapy might be extremely unfavorable - in case of intraventricular localization progression in the form of tumor implantation on ventricular ependyma is possible.

[Characteristics of medulloblastoma in children under age of three years].

We present a series of 51 medulloblastoma in children under three years, collected in N.N. Burdenko Neurosurgical Institute from 2000 to 2010. 57% of the tumors showed desmoplastic/nodular histology. Performed fluorescence in situ hybridization (FISH) analysis revealed the MYC oncogene amplification in 4%, the MYCN oncogene amplification - in 8%, isochromosome 17q - in 16% of cases. 9q deletion was found in 8% of desmoplastic/ nodular medulloblastomas. Our results showed that desmoplastic/nodular medulloblastoma has a positive predictive value for progression-free survival. Another feature of a biology of medulloblastomas in children younger than three years is the lack of nuclear accumulation of beta-catenin, and 6q deletion. Medulloblastomas with MYCN oncogene amplification often exhibit desmoplastic/nodular histology and a relatively favorable outcome. The most unfavorable prognostic marker is the MYC oncogene amplification, which in our series of 100% combined with the large cell/anaplastic medulloblastoma and isochromosome 17q - such tumors should be included in the "high risk" protocol.

Endogenous and Exogenous Factors Affecting the Surgical Technique (Review).

In this review, we analyzed essential factors affecting precise manual movements in microsurgery described in the medical literature. The search for publications in English and Russian languages was conducted in the PubMed database without limitation by the date of publication. The search was carried out according to the following descriptors: surgical procedures, dexterity, microsurgery, caffeine, alcohol, nicotine, physical exercise, sleep deprivation, posture. Only randomized and cohort studies involving doctors and students with surgical specialties were included in the analysis. We did not include papers in which only psychological (non-motor) aspects were studied. Due to the limited number of publications meeting the inclusion criteria and conflicting results in some of them, the presented review does not allow us to formulate unambiguous conclusions and recommendations. Further studies (deep and fundamental) of endogenous and exogenous factors affecting the microsurgical technique are needed.

[The clinical and epidemiological characteristics of acute brain injury in children of the Republic of Kabardino-Balkaria].

The paper provides the data of an epidemiological survey for acute brain injury in the pediatric population in Nalchik (Republic of Kabardino-Balkaria) during 3 years (1991-1993). The incidence of acute brain injury was 4.32 +/- 0.30, 5.13 +/- 0.34, and 5.44 +/- 0.36 per 1000 children in 2001, 2002, and 2003, respectively, i.e. there is a statistically significant trend for the figures to increase (t = 2.39; p < 0.01). The death of victims was caused by their severe condition and mortality rates were 0.91; those due to brain contusion and compression were 2.68. The paper also presents the structure of victims by the severity of injury and by the differentiation of these parameters by age, and the relationship of craniocerebral traumatism to a number of social factors. Particular emphasis is laid on the quality of specialized aid. The minimum required diagnostic equipment is determined for the correct evaluation of the severity of injury. Algorithms of delivering care to children depending to their age are given, which make the work of an admission department physician easier, reduce the number of diagnostic and therapeutic errors, and promote a reduction in economic costs. The findings enable one to gain an idea of the level of craniocerebral traumatism and to define measures to improve health care.