[Introduction to the use of 125 iodine in interstitial radiotherapy (author's transl)].

The 125-iodine is employed for definitive implantation in the treatment of some apical and non apical lung tumors, and in pancreas and prostate tumors. The results obtained by the authors are not evaluable and the results of north-american literature are reported. The 125-iodine properties are original and allows a very important progress above all of the protection problems.