A Study of RC48-ADC in Advanced Melanoma Subjects With HER2 Variant (Mutation, Amplification, Overexpression)

This study is a phase IIa multicentre,single-arm, open-label, clinical study to evaluate the efficacy and safety of recombinant humanized anti-HER2 monoclonal antibody-Monomethyl auristatin E (MMAE) conjugate for the treatment of HER2- positive advanced melanoma. HER2 mutation is defined as the presence of HER2 gene mutations in primary or metastatic tumour tissue as detected by immunohistochemistry (IHC). HER2 gene mutation.