RecruitingPhase 2Drug trialAGNOSTIC THERAPY IN A PHASE II SINGLE-ARM STUDY IN FIRST-LINE TREATMENT OF DURVALUMAB IN ASSOCIATION WITH CARBOPLATIN OR CISPLATIN AND ETOPOSIDE IN PATIENTS AFFECTED BY EXTENSIVE STAGE - EXTRAPULMONARY SMALL CELL CARCINOMAThis is a phase II, single-arm, multicenter study to evaluate the activity and safety of durvalumab in combination with carboplatin or cisplatin plus etoposide in patients with treated ES-EPSCC.