Study Evaluating the Safety and the Efficacy of Combination of Atezolizumab, Tiragolumab and and Stereotactic Body Radiation Therapy in Patients With Oligometastatic Multiorgan (IMMUNOs-SBRT)

This study will be composed of 2 stepms. First step will be a phase I with the aim to establish the recommended safety scheme of administration (concomitant or sequential) of tiragolumab + atezolizumab + SBRT. The phase I will enrolled only patients from the cohort 1 (metastatic non-small cell lung cancer). The second step will be an expansion cohorts phase at the recommended scheme of administration. The second step will enrolled patients from 4 different cohorts (metastatic non-small cell lung cancer, metastatic bladder cancer, metastatic renal cell carcinoma, metastatic head and neck carcinoma).