[Primary lymphoma of the heart: difficulties in diagnosis and treatment].

Primary lymphoma of the heart (non-Hodgkin's lymphoma primarily of B-cells affecting first the heart and pericardium) is a rare disease which accounts for 1.3-2.0% of all primary tumors of the heart.

[Severe disseminated constrictive polyserositis in a patient with rheumatoid arthritis].

Constrictive polyserositis (pleuritis, pericarditis) is a syndrome within the underlying disease (tuberculosis, periodic disease, rheumatoid arthritis, systemic lupus erythematosus, asbestos, silicosis, uremia, some genetic diseases), a complication due to chest surgery or radiation or drug therapy, is occasionally idiopathic (fibrosing mediastinitis). There are frequently great difficulties in making its nosological diagnosis. The paper describes a patient in whom the onset of disease was exudative pleurisy with the signs of constriction, arthralgias; pleural punctures provided serous exudates with 80% lymphocytes.

[Electrophoretic analysis of genome RNA of human rotaviruses].

The schemes for profiles of migration of RNA segments from human rotaviruses isolated in Gorky city in 1981-1987 are presented. The groups of the "long", "short" and "wide" electrophoretypes were identified. The dominant rotaviral phoretypes are determined.

[Age-related radiosensitivity of the crystalline lens in chronic experimental internal irradiation with 137Cs at low doses].

Internal whole-body irradiation of mice for 1 year with incorporated 137Cs at a dose of 0.5 eV was shown to make a significant cataractogenic effect on the lens. By annual rate this dose exceeded the existing maximum permissible dose only three times and was less than 10% of a cumulative dose for professionals having to do with ionizing radiation which they can accumulate at the maximum permissible dose level in annual irradiation for 50 years.