[Radiobiological aspects of preoperative radiotherapy (author's transl)].

Radiobiological considerations suggest the use of preoperative radiotherapy with subcurative doses in malignancies known for frequent local recurrence or for easy metastatic spread during surgery. Clinical experience with this form of preoperative radiotherapy on esophageal cancer is being analyzed in regard to its radiobiological significance.

[Radiation sensitivity of the amelanotic hamstermelanoma in vitro and in vivo (author's transl)].

Radiation sensitivity of the hamster melanoma AMel 3 was studied in vivo and in vitro. In vitro, a dose-effect curve with the dose Do=155 rd and the extrapolation number 10 was obtained. In consideration of an oxygen enhancement factor of 2.