[Results of combined therapy for malignant tumors of the nasal cavity and accessory nasal sinus depending on the fractionation of preoperative radiotherapy].

Data on the treatment of 215 patients with locally advanced malignancies of the nasal cavity and accessory nasal sinus are presented. All patients received preoperative radiotherapy using different fractionation schemes under a total target dose (TTD) of 32-40 Gy. Surgery was carried out two weeks later. Whenever radicality of surgery was in doubt, postoperative gamma therapy included exposure to 2 Gy 5 times a week (TTD--30-40 Gy) (n=121). Group I (n-57) received radiation at standard fractionated dosage. In group II (n=66), fractionation, tentatively considered "dynamic" was used while, in group III, fractionation was dynamic in actual fact. In group IV (n=10), superfractionation (1+1 Gy) was employed in group V (n=6),--gamma-neutron therapy. Patients in group VI (n=51) were operated on as scheduled and received 5 Gy, twice a week (TTD--20 Gy). According to 5-year follow-up, the best results were obtained with the use of larger doses of preoperative radiation (groups II, III, VI). Postoperative radiotherapy proved ineffective and it would be useless unless ablative procedures were definitely faulty during surgery.

[Chemoradiation therapy in conjunction with physical means of radiomodification for locally advanced laryngeal cancer].

The study deals with the results of examination and treatment of 1040 patients with cancer (T3-4N0-3M0) of larynx and laryngopharynx. Radiotherapy was given to 358 patients concurrently with systemic polychemotherapy and different means of radiomodification. The remaining patients (682) receiving the same treatment minus systemic polychemotherapy were in control. Relapse-free (72.6%) and overall survival (82.7%) in the study group was significantly higher than in controls (54.7% and 63.4%, respectively) (p < 0.001). Moreover, an organ's function was preserved in 57.1% compared with 28.5% in control (p < 0.001).

[Radiation-induced and embryotoxic effects in experimental hyperthyroidism]. / Eksperimental'no indutsirovannyi gipertireoz: ego radioembriotoksicheskoe deistvie.

The purpose of this article was investigation the development of the posterity rat (line Wistar) in the postnatal ontogenesis after combined and separate action of gamma-radiation (1.25 Gy at 20 days) and hyperthyroidism, provoked by toxic thyroid doses of 100 mg thyroidin per rat. It was shown that hyperthyroidism did not affect physical development of the irradiated posterity, but in a long-time period (7 month) it was revealed a decrease in ability to the training of posterity rats after the combined action of the factors.

[Effects of electromagnetic field of thermal intensity on the hypophysis-thyroid unit of the neuroendocrine system]. / Vliianie élektromagnitnykh polei teplovoi intensivnosti na gipofiz-tireoidnoe zveno neiroéndokrinnoi sistemy.

Acute 12-minute exposure of laboratory rats to microwaves with specific dose rate (SAR) of 30 W/kg that exceeded a basal metabolism caused a transient response of hyppophysis-thyroid system of compensatory-adaptive character. Prolonged exposure to microwaves of less intensity (SAR = 6 W/kg, which approximately corresponds to basic metabolic rate for these animals) caused insufficiency of the function of thyroid control in a form of primary hypothyroidis.