[The specific immunophenotypic features of nasopharyngeal carcinoma]. / Immunofenotipicheskie osobennosti nazofaringeal'noi kartsinomy.

We have undertaken the retrospective analysis of the medical histories of 119 patients presenting with nasopharyngeal carcinoma (NPC) and the biopsy specimens obtained from them; the wereinvestigated with the use of the histological (staining of the micropreparations with hematoxylin and eosin) and immunehistochemical (monoclonal murine antibodies against Pan-cytokeratin, CK 5/6, EBV, CK7, CK19, p16) techniques. The study has demonstrated the presence of non-differentiated nasopharyngeal carcinoma in 97 patients, diffuse large-cell B-lymphoma in 18 ones, melanoma of the nasopharyngeal mucous membrane in 2, and nasopharyngeal rhabdosarcoma in 1 patient. The immunohistochemical study revealed co-expression of the markers of Epstein-Barr virus, Pan-cytokeratin, and CK 5/6 in the non-differentiated nasopharyngeal carcinoma .

[Clinical, morphological, and prognostic features of papillary thyroid carcinoma with different BRAF mutational status assessed by immunohistochemistry]. / Klinicheskie, morfologicheskie i prognosticheskie osobennosti papilliarnogo raka shchitovidnoi zhelezy s razlichnym statusom BRAF, ustanovlennym immunogistokhimicheskim metodom.

The somatic mutation in BRAFT1799A (BRAFV600E), the data on the prognostic role of which are contradictory, is one of the most common molecular genetic abnormalities in the cells of papillary thyroid carcinoma (PTC). OBJECTIVE: To investigate the association of the immunoexpression of mutant BRAF in PTC with different morphological characteristics and long-term treatment results in patients. MATERIAL AND METHODS: Information on inpatients with PTC was obtained from the database of the Pathology Department, A.F. Tsyb Medical Radiology Research Center (a branch of the National Medical Radiology Research Center, Ministry of Health of the Russia). The paraffin-embedded blocks of surgically removed primary, metastatic, and recurrent PTC tissues were cut and stained with hematoxylin and eosin and anti-mutant BRAF monoclonal antibodies. The results of immunohistochemical tests were assessed and the frequency of BRAF immunoexpression was analyzed in relation to various clinical and morphological parameters of tumor growth, the pattern and volume of treatment in the patients, by taking into account its long-term results (the presence or absence of tumor recurrence and metastases in the postoperative period). RESULTS: The expression of mutant BRAF (BRAF+) was noted in 29 (39.3%) of the 74 cases of PTC. The BRAF+ group differed from the BRAF group by a higher proportion of male patients, older age, advanced clinical stage of carcinoma, a predominance of papillary structure of tumors, and a higher frequency of their recurrence and/or metastases in the postoperative period. CONCLUSION: The immunohistochemical assessment of BRAF status opens up a possibility to predict local recurrence and metastases in the postoperative period in patients treated for PTC.

Cells of Benign and Borderline Thyroid Tumor Express Malignancy Markers.

We studied expression of malignancy markers galectin-3, cytokeratin-19, HBME-1, fibronectin, and cyclin D1 in cells of benign (n=51), malignant (n=87), and borderline (n=53) tumors. The results indicate that 3.9% benign and 41.5% borderline tumors express malignancy markers (specificity 98-100%). Follow up over 1-10 years after surgical treatment for borderline tumors showed no progression of tumor growth. We conclude that some benign and borderline tumors represent low-grade neoplasms with favorable prognosis.

[High-grade thyroid cancer].

The paper analyzes the data available in the literature on the morphological and prognostic features of relatively rare high-grade thyroid cancer. It shows the difficulties and unsolved problems of morphological diagnosis and the possibilities of current methods for immunohistochemical and molecular genetic studies to determine the malignant potential of the tumor and prognosis.

[The first experience with the concurrent effect of YAG-neodymium and YAG-erbium laser on experimental animal tissues and the possibility of its use in surgery]. / Pervyi opyt sovmestnogo vozdeistvia izluchenia AIG-neodimovogo i AIG-érbievogo lazerov na tkani éksperimental'nykh zhivotnykh i vozmozhnosti ego ispol'zovania v khirurgii.

To guarantee the necessary rate of cutting live tissues with adequate hemostasis along the line of the incision, the authors studied isolated and joint effect of radiations of AIG-neodymium and AIG-erbium lasers on the tissues of laboratory animals. The possibility of accomplishing intraoperative hemostasis on the parenchymal organs was studied in experiments with AIG-neodymium laser. A good dissection effect in cutting various tissues was produced in the second series of experiments with AIG-erbium laser. The simultaneous action of AIG-neodymium and AIG-erbium beams converged at one point on the surface of the biological object was studied in the third series of experiments. It was found that the effect ensures a good dissection of tissues with sufficient hemostasis. The results of dynamic morphological studies are shown. The possibility of using the device in surgery is discussed.

[Enzyme status of blood cells in premature children during the treatment of omphalitis by helium-neon laser radiation]. / Fermentnyi status kletok krovi u nedonoshennykh detei pri lechenii omfalitov gelii-neonovym lazernym izlucheniem.

Helium-neon laser radiation was employed in the treatment of 27 premature children suffering from omphalitis. It has been established that helium-neon laser radiation produces a favourable effect on the healing and epithelization of the umbilical wound, activates lymphocyte succinate dehydrogenase in premature children. The rate of wound healing correlates with the initial enzymic status, with the number of sessions of laser therapy and the general estimation of the previous development of the child in accordance with the prognostic coefficient of sepsis development.

[Optimal parameters of carbon dioxide laser irradiation in the prevention and treatment of suppurative-inflammatory surgical diseases in children]. / Optimal'nye parametry uglekislotnogo lazernogo izlucheniia v profilaktike i lechenii gnoino-vospalitel'nykh khirurgicheskikh zabolevanii u detei.

An analysis of experience with using the CO2 laser radiation with power density of 15-60 Wt/cm2 and 100 Wt/cm2 with the purpose in mind to prevent acute inflammatory complications and treat pyo-inflammatory surgical diseases in children. Results of microbiological and histological researches of the laser radiation studied are presented.

[Use of carbon dioxide laser radiation in the treatment of wounds in children]. / Ispol'zovanie izlucheniia uglekislotnogo lazera pri lechenii ran u detei.

Results of treatment of 84 children with purulent and posttraumatic wounds with the help of CO2 laser are analyzed. The laser was used as a "surgical scalpel" and for necrectomy in suppurations. The focused and disfocused laser rays were used. The radiation was shown to exert a favorable effect on tissue regeneration and to accelerate the wound healing.