[Quantitative assessment of morphologic changes in tumors during combined use of irradiation, induced hyperglycemia...

The paper is concerned with morphometric evaluation of changes in Ehrlich mouse solid carcinoma after a separate, dual and combined use of x-ray irradiation, induced hyperglycemia (IH) and local hyperthermia (HT), using two-staged quantitative analysis of tumor tissue injuries. A portion of viable tissue was determined at the first stage, and the density of location of undestroyed tumor cells was evaluated at the second stage. The general result was characterized by the product of these indices. Disorders in the tumor tissue structure were noted in 24 h, the main damage being done by IH and HT in the center of a tumor. In 48 h the total effect was on the increase only in groups with irradiation as a result of cell death in the peripheral zone. In the double use of the agents their combined effect was less than the additive one, and the combined use of all three methods resulted in obvious synergism, and the number of viable tumor cells (by morphological criteria) was decreased by more than two orders.