[en] In local radiation therapy, patients are exposed to radiation not only from the primary beam but also, and more generally, from scattered radiation during irradiation. We have conducted a study to estimate the dose level on testes for 60 patients underwent susdiaphragmatic and subdiaphragmatic lymph node irradiation with 25 MV X rays. Testes of each patient was measured five times while under treatment by using thermoluminescent dosimeters (LiF). In 35 cases, dosimeter showed that radiation was under the additional shield which completed the primary one to reduce exposure. In 41 patients, measurements were performed with microrods which were read with a manual reader and, in the others, an automatic reader and chips were used. This study showed that: -for susdiaphragmatic irradiation, the median dose received by each patient on testes was 0,6% of the reference dose. -for subdiaphragmatic irradiation, the median dose was 5.75 % for cases without additional shield and was 3 % for ones with additional shield