[Aggressive fibromatosis of the small pelvis].

Experience in the treatment of 25 patients with aggressive fibromatosis of the true pelvis is discussed. To establish a precise diagnosis obligatory and special methods of examination were applied. Secondary changes in the adjacent organs and structures were found in 24 patients.

[The morphological and ultrastructural changes in the small intestine of rats with long-term constant exposure to low doses of ionizing radiation].

Variable dystrophic and necrobiotic changes were revealed in epithelial and stromal thin intestine cells in rats who had been living for a long time in Chernobyl and Kiev animal houses. There were no principal differences of these changes in the both groups of animals and their dynamics. The rats that lived in Chernobyl and consumed more polluted food have some special features: crypt mucoidisation, epithelial cell apoptosis, low pinocytic activity of endothelial cells and increase of dense epithelial and capillary cells (coagulation necrosis type).

[The biological effects in animals in relation to the accident at the Chernobyl Atomic Electric Power Station. 5. Longevity and the carcinogenic effects].

Remote effects in laboratory animals living in conditions of exposure to a mixture of external and internal radiation resulted from the Chernobyl A.P.S.

[The biological effects in animals in relation to the accident at the Chernobyl Atomic Electric Power Station. 3. The morphological and ultrastructural changes in the lungs of rats].

The morphological and ultrastructural changes revealed in the lungs of rats kept within the Chernobyl accident zone during the period of 6 to 24 months were shown to be uniform and multicomponent. The changes were found both in the respiratory and the vascular connective tissue. The inflammatory processes occurred with formation of pneumonic foci, hypo- and disatelectasis, emphysematous changes, impairment of interalveolar septa, and connective tissue cell proliferation.

[The biological effects in animals related to the accident at the Chernobyl Atomic Electric Power Station. 4. The morphological and ultrastructural changes in the liver of rats].

A study was made of the morphological and ultrastructural changes in hepatic tissue of rats lived within the Chernobyl accident zone during the period of 6 to 25 months. Considerable nonspecific changes in hepatocytes (fatty, vacuolar and parenchymatous degeneration, and hepatocyte necrobiosis) were seen throughout the entire period of observation. Coagulation necrosis of certain hepatocytes, Kupffer and endothelial cells, and the development of microcholangiomas by the end of the second year were the most characteristic alterations.