<prompt> Testicular tumour most sensitive to radiation isTeratomaLymphomaMixed germ cell tumourSeminoma  <response>: Seminomas are most radiosensitive. So after orchidectomy radiotherapy is given to increase the cure rate and also to reduce relapseexcellent results in stage 1 and 2 seminomas. Radiotherapy is not beneficial in teratomas as they are less radiosensitive. Other radiosensitive tumours are squamoua cell carcinoma, basal cell carcinoma, hodgkins lymphoma.Reference : page 1087 and1143 SRBs manual of surgery 5th edition 