Investigate the role of consolidative radiotherapy treatment at the thoraco-mediastinal level in the patient suffering from lung microcytoma - extensive disease and treated with chemo-immunotherapy with atezolizumab, in association with maintenance therapy with atezolizumab.
Histological diagnosis of lung microcytoma;
Age ≥18 years;
Performance status according to ECOG 0-2;
Extended disease at the time of first line oncological treatment;
Previous radiotherapy treatment at the thoraco-mediastinal level;
In disease progression after chemo-immunotherapy treatment.