Other human tumour types have also been reported to harbour HER‐2 mutations, including head and neck cancers, bladder cancers, gastric cancers, ovarian cancers, hepatic cancers 6, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21. This evidence concerns the gene ERBB2 and urinary bladder cancer.