The study consists of two stages.~Part A of this study is an open-label, single arm, multicenter Phase IIa clinical study in patients with inoperable, radiotherapy ineligible RM-NPC who have failed (or are intolerable) at least 1 prior line platinum-based systemic chemotherapy and PD-1 (L1) inhibitors.~Part B is an open-label, randomized, multicenter Phase IIb study to compare the efficacy and safety of MRG003 versus capecitabine/docetaxel in patients with RM-NPC who have failed at least 2 prior lines of systemic chemotherapy and PD-1 (L1) inhibitors.
The objective of this study is to assess the safety, efficacy, pharmacokinetics, and immunogenicity of MRG003 in patients with recurrent metastatic nasopharyngeal carcinoma.