[Methods of diagnosis of non-specific and specific lymphideniates of the jaw-facial part in children (literature review)].

OBJECTIVE: Introduction: Insufficient basic knowledge on the mechanisms of the multifactoral etiology and pathogenesis of various forms of maxillofacial lymphadenitis of odontogenic and non-odontogenic nature in children causes difficulties in making differential diagnosis. The algorithm of their examination involves a large number of methods, each of which has its own advantages and disadvantages with variable informativeness, depending on the particular situation. The aim: The paper is aimed atfamiliarization of broad medical public with informativeness of diagnostic measures in the nonspecific and specific affection of lymph nodes of the maxillofacial area in children. PATIENTS AND METHODS: Materials and methods: A thorough comprehensive analysis and generalization of scientific achievements elucidated in the fundamental and periodical publications, relating to diseases of the lymphatic system, has been carried out. RESULTS: Results: It has been establishedthat, despite a large variety of diseases accompanied by the reaction of the lymph nodes of different anatomic localization, current diagnostic possibilities are potent to establish a clinical diagnosis in most cases. In this way, the current diagnostic model requires the interaction of clinicians, infectiologists, molecular biologists, geneticists and morphologists. In this regard, the issues of efficient organization of the diagnostic process, detailing all stages of the search for accurate diagnosis, are crucial. CONCLUSION: Conclusions: The collected material on various forms of lymphadenitis and their secondary affection is fragmentary to date due to the absence of the unified methodological approach to carrying out differential diagnosis, which requires generalization and systematization of scientific groundwork. Unfortunately, the algorithms of examination of this category of patients, especially with lymphadenopathy, are not sufficiently developed to date, indicating the need for further search and optimization of diagnostic criteria taking into account modern realities.

Morphological and immunohistochemical characteristics of human trigeminal ganglion neurons in the prenatal period of development.

INTRODUCTION: Data related to the amount, size and morphological characteristics of cell elements of sensory ganglia at different stages of prenatal development has not been fully elucidated in recent scientific publications. At the same time publications considering the study of cell structure of trigeminal ganglion in the postnatal period confirm heterogeneity of its neurons. The aim of the research was to study morphological and immunohistochemical characteristics of human trigeminal ganglion neurons at 12-14 weeks of prenatal development. MATERIAL AND METHODS: The study was made on 24 trigeminal ganglions of 12 human fetuses at 12 to 14 weeks of prenatal development after abortion made on social and medical indications. RESULTS: At the studied period of the intrauterine development nerve cells of the trigeminal ganglion significantly differed in size, tinctorial properties and degree of argentophility of the perikaryon. At the same time, the number of small nerve cells with an average diameter of less than 15 µm prevailed. Immunohistochemical study allowed detecting the apparent Bcl-2 expression in the overwhelming number of small neurons; the expression of this marker has been observed in 50% of cells of the medium-sized neurons. No Bcl-2 expression has been found in most of the large neurons. Almost all the neurons, regardless of the size, showed moderate Ki-67 expression, protein S-100. VEGF expression has also occurred in the vast majority of the nerve cells of all size groups. CONCLUSIONS: 1. Human trigeminal ganglion neurons both at 12-14 weeks of prenatal development and in postnatal period are represented by heterogeneous population. 2. Polymorphism of trigeminal ganglion neurons has been found by all applied techniques. 3. Detected polymorphism is the evidence of processes of maturation and differentiation of neurons in human trigeminal ganglion at 12-14 weeks of prenatal development.