cases of seminoma in person who worked in the same place that exposed to radio frequency (RF) waves.

Case Report
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**The first case**

He was a 31-year-old man who has worked in a radio station for 6 years while he was left that place 10 years before diagnosis of seminoma. Initial evaluation revealed stage 1 seminoma and he was underwent radiotherapy after radical orchiectomy and his disease free until now.

**The second case**

He was a 37-year-old man with seminoma diagnosis after radical orchiectomy on his 25 years after 6 years work in the same place. Because of stage 1 disease he received radiotherapy and it made him disease free until now.

**The third case**

He was a testicular cancer with the same pathology, seminoma, but with inguinal metastasis. He was worked in that placefor 16 years and was diagnosed for seminoma at the last one year of his job. After radical orchiectomy radiotherapy is done his response was good and he is under follow up now.

Their workplace was a radio station that consist multiple receiver and transmitter antennas and the frequency of waves were in the radiofrequency spectrum. It seems in this station some parasite transmitter for satellite wave have been worked. One of these antennas has about 400 meter height. The staffs worked there for 24 hours, however in their resting time for 48 hours were in that enclosure too. So they didn't t free of exposure.

Discussion
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Rapid technological progress led to increase man-made sources for radiofrequency that some of these sources are mobile communication, microwave oven, Wi-Fi, television, antenna, detection