[Morphological changes in the late periods of life in mice born after the induction of the graft vs. host reaction in their mothers].

Histological changes were studied in various organs of 1--2-year-old mice born after induction of the graft-versus-host reaction in mothers. The lymphoid tissue showed predominant atrophic changes, and a number of mice (61.2%) developed amyloidosis in the spleen and liver. The lymphoid infiltrates were found in the liver, kidneys, lungs and heart. In some cases glomerulonephritis, vasculitis and liver distrophy were recognized. Lymphoid malignancies were recorded in 17.7% of cases, wherease neoplasms in the control mice of the same age were incident only in 4.1%. Some neoplasms could be transplanted to adult F1 mice. A cell-free extract inocualted into newborn mice did not produce tumours during observational period of 14 months.