The expression of MAGE-A4 antigen in tumour has been reported in various human malignancies, ovarian neoplasms (Yakirevich et al, 2003), mucosal melanomas of the head and neck (Prasad et al, 2004), oesophageal adenocarcinomas (Lin et al, 2004), colorectal cancer (Li et al, 2005) and lung cancer (Tajima et al, 2003). The gene discussed is MAGEA4; the disease is neoplasm.