ERBB2 and neoplasm: HER-2(9369) represents a common epitope expressed by various tumour types including ovarian (Kono et al, 1997; Rongcun et al, 1999), renal cell (Brossart et al, 1998; Seliger et al, 2000) and breast (Brossart et al, 1998) carcinomas and melanoma cells (Rongcun et al, 1999).