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It is shown that 210Po in the complex with a sorbent can be fixed in the organs, particularly in the proximal renal tubules. This, in the authors' opinion, can be the cause of various complications of the therapy with the adsorbents including the development of tumours.

Materials are presented on six cases of fatal acute radiation disease consequent to relatively proportional beta- and gamma-irradiation after accident in the nuclear submarine. The comparison is performed of this material with the data published on the radiation sequelae of the Chernobyl nuclear catastrophe.

A brief review of the pathology of human radiation sickness is presented. The author recommends providing information to the practitioners, including pathologists, of new data concerning the manifestations of acute radiation sickness at various forms of radiation damage induced in the extreme situations.

Quantitative changes of structural correlations of transplanted allogenic human kidneys were examined in the histological slides by means of computer micromorphometry. The measurements were performed in 663 transplants selected randomly which had been in the recipient's body from several hours till 14.5 years. As a result of the study, parameters of glomeruli, tubules, blood vessels and connective tissue in the overall mass of donor kidneys were established starting from the time before transplantation and 6 months, 1-1.5, 2-3, 4-5, 7-14.5 years after transplantation. A progressive increase of sclerotic changes in the transplant is confirmed and the hypotheses about their genesis are proposed.

The material of 560 allogenic corpse kidney transplantations was studied and the conclusion drawn on the possibility of the development in the kidney graft of two types of vascular lesions. The first type is referred to as a genuine angiopathy the causes and structure of which change depending on the time of donor kidney persistence in the recipient. The second type is regarded as immune vasculitis. The role of some immune and non-immune factors in the development of transplant vascular bed changes is discussed.

The analysis of 550 records of autopsies of patients who had suffered from chronic renal insufficiency and had been treated by transplantation of corpse kidney, programme hemodialysis, and conservatively, was carried out. Significant differences in the structure of complications and causes of death in these kinds of correction of the terminal stage of chronic renal insufficiency were established. Each of them has its own most frequent causes of complications and fatal outcomes associated both with the main disease and the type of treatment used.

On the basis of morphological data it was established that spontaneous ruptures of allotransplanted kidneys of man were connected mainly with juxtamedullar shunting of their blood flow; Impairment of the blood flow was apparently caused both by immune and nonimmune endogenous humoral factors. The pathomorphological picture in spontaneous ruptures of transplants differed from structural changes observed in traumatic damage of the kidney.