Concentrated irradiation as a stage of multimodal treatment of cancer of the proximal part of the stomach

: The postradiation changes in carcinoma of the proximal part of the stomach were studied in 32 patients: the parenchymal volume (PV), the damage index (DI), and the mitotic index (MI). The controls were 15 cases in which radiotherapy was not applied. Radiotherapy with large fractions (5 Gy 4 times daily) reduced the PV to 27 +/- 0.8 u on average as compared to the controls (77 +/- 1 u) and lowered the MI to 2.3 +/- 0.5% as compared to the controls (8% +/- 1), the DI ranged widely (3-67%). The methods of quantitative morphological study of tumors may be useful in objective evaluation of the efficacy of various schemes of preoperative concentrated irradiation.