CTLA4 and neoplasm: Treatment with CTLA4 ligands CD80/CD86 induces apoptosis with activation of caspase‐8 and caspase‐3.13 CTLA4 expression levels in NSCLC cancer tissues have been studied for its relevance in prognosis.12 These data indicate that tumour cell‐intrinsic CTLA4 may play a role in tumorigenesis.