[Consequences of radiation on tissues].

Tissular and cellular radiation-induced injuries. The authors examine morphological, tissular and cellular radiation-induced injuries utilizing anatomo-clinical case reports and experiments in the pig. One must distinguish early and delayed tissular lesions. In the latter, appearing in general after at least six months, vasculo-connective changes are the most important, leading to sclerosis. Indeed, because of the vascular damages the histo-haematic barrier is enlarged leading to a decrease of tissular resistance to injury, long and difficult tissular repairs after a surgical operation. At the end the authors mention some special morphological features concerning the site of lesions.