I. To assess the efficacy of nivolumab and ipilimumab according to response rate (RR), disease control rate (DCR; complete response [CR], partial response [PR], and stable disease [SD] at 6 and 12 months), overall survival (OS) and progression free survival (PFS) using Response Evaluation Criteria in Solid Tumors (RECIST) criteria in patients with recurrent or metastatic ACC.