BACKGROUND/AIM The cell line C6 is a continuous cell line of rat glioma and, as a transplantable line, is frequently used for induction into in vivo model of primary brain tumor. It is believed that, pursuant to its histological traits and biological behavior, this experimental tumor corresponds to human anaplastic astrocytoma of grade II/III, which is characterized by proliferative and invasive potency, and marked cell differentiation. The aim of this study was to determine macroscopic analysis of rat brain with implanted tumor during tumorigenesis, histological features of tumor cells of induced brain tumor and markers of proliferation (proliferation cell nuclear antigen - PCNA, cytokeratin - CK 19) and differentiation (glial fibrillary acidic protein -GFAP) in rat brain with implanted tumor. METHODS To determine histological structure of the brain with implanted C6 cells, we used brain sections stained for hematoxylin-eosin or kresyl violet, whereas other sections were immunohistochemically stained for GFAP, CK 19 and PCNA. RESULTS A statistically significant difference in weights of the left and right brain hemispheres with implanted tumors during tumorigenesis in as soon as 7 days from the day of inducing tumors was revealed. The tumor was of cellular type, with distinct pleomorphism of cells and frequent hyperchromasia of the nucleus. Immunohistochemical staining for PCNA revealed a significant number of positive cells on the days 7, 14 and 21 day following the implantation of C6 cells. CK 19 positive cells were present in both brain hemispheres, and numerous GFAP positive astrocytes were found around the puncture lesion. CONCLUSIONS Within the experimental conditions of the present research, C6 glioma did not demonstrate any relevant deviations concerning development, clinical symptomatology and macroscopic anatomy relative to those already described in the literature.

The nature of mental disorders, the attitudes and prejudices of the social community towards psychiatric patients, the behavior and treatment of mental patients, all bring about numerous dilemmas and prejudices. When a patient is diagnosed with a mental disorder, he may suffer restrictions in the field of general human rights. However, the biggest problems in clinical practice occur in the treatment of patients who, besides their mental disorder also have a somatic disease. We report a 56-years-old female with a severe renal failure who refused to undergo dialysis. Following the patient's refusal to sign an informed consent, a psychiatrist was called in for consultation and diagnosed an acute psychotic reaction. To manage the delusions and acute psychotic reactions, risperidone in the dose of 2 mg was started. After 22 days, the patient still had marked psychotic symptoms. A psychiatrist, a nephrologist and an anesthesiologist, in the presence of the spouse on the grounds of her life-threatening condition, decided to apply the necessary medical procedures even without the patient's consent. A day after the start of dialysis the patient still had delusional ideas, but without the presence of anxiety, and the patient no longer offered resistance to dialysis. Four days after the first dialysis, the patient was calm, had vague memories about the entire previous period, and signed the informed consent concerning her further treatment.

Acrylic based resins are frequently used in daily dental practice. The most common use of the materials includes denture bases and denture liners, temporary crowns and orthodontic appliances. In the mouth, properties and functional efficiency of applied acrylic resins depend on internal factors related to the methods and conditions of polymerization and on external factors that are related to the environment in which the material is placed. Residual monomer, which is released as a result of interaction of both sets of factors is often associated with irritation, inflammatory and allergic reactions of oral mucosa. The aim of this paper is to review literature dealing with the conditions of polymerization and biodegradation of acrylic resins under certain conditions in the oral cavity and their impact on oral health (reviewed literature available on Medline database during the past two decades.) Conclusion: Methods and conditions of acrylate polymerization, on the one hand, and properties of saliva, chewing and the presence of microorganisms in the oral cavity, on the other hand, can be considered responsible for the release of residual monomers. Clinically significant events followed by redness and erosion of the oral mucosa, burning sensation and burning mucosa and tongue, may be due to the effects of released, potentially cytotoxic, residual monomers.

BACKGROUND/AIM The most sensitive indicators for detecting recurrence of well-differentiated thyroid cancer (DTC) are 131I whole body scintigraphy (WBS) and measurement of serum thyroglobulin (Tg). In order to perform it, it is necessary to raise the level of endogenous tiroid-stimulating hormon (TSH), which can be achieved by L-thyroxine withdrawal for 3-5 weeks or administration of recombinant human thyrotropin (rhTSH) without requiring the discontinuation of thyroid hormone therapy. The aim of this study was to assess the effect of rhTSH using in comparison to the traditional thyroid hormone withdrawal in the follow-up of patients with DTC. METHODS This retrospective study included 44 patients, mean age 48.8 years, with DTC divided into 2 groups. The group I consisted of patients (n = 31) in which the analysis in the follow-up (WBS with 131I, TSH, Tg and antiTgAt) made in the hypothyroid state, and group II patients (n = 13) in which they made after the administration of rhTSH. The presence of 13 symptoms and signs of hypothyroidism was investigated on the day of giving 131I. Quality of life was evaluated using a modified form: the quality of life scale (SF-36) completed on the day of giving 131I. RESULTS In both groups, serum TSH reached a very good stimulation level, but significantly higher in the group II (group I 30.3-101.5 microlU/mL, group II 68.6-192.0 microlU/mL, p < 0.05). In both groups, TSH-stimulated Tg was higher (group I 0.1-546.0 ng/mL, group II 0.1-7517 ng/mL) comapred to value during the L-thyroxine therapy (group I 0.1-495.0 ng/mL, group II 0.1-2785 ng/mL). There was no difference in technical quality of WBS obtained from both groups. The patients in the group I had attended 8-13 symptoms of hypothyroidism, while patients in group II did not have symptoms of hypothyroidism. The patients after application of rhTSH, showed statistically significantly better quality of life as compared with those who showed to have L-thyroxine withdrawal, (74-91 points vs 43-62 points; p < 0.05). The rhTSH was well tolerated, with nausea occurring in only one patient. CONCLUSION Administration of rhTSH in the follow-up of patients with DTC prevents the debilitating effects of hypothyroidism contributing to the maintenance of metabolic homeostasis of the organism and preserves the quality of life. RhTSH is safe, effective and easy to use, but is still an expensive product in our country.