The authors of the paper by Howell et al in the September issue (HRPT2 mutations are associated with malignancy in sporadic parathyroid tumours. J Med Genet 2003;40:657–63) have notified us of an error. In figure 1, third row from the bottom, for Family ID (Family F1)4†, the histology of the tumour should be Adenoma and not Carcinoma. The authors apologise for the error.