A study of 19 tumours found no apparent difference between post-Hodgkin's and sporadic breast cancers in loss of heterozygosity or in TP53 and K-ras mutations, and a nonsignificantly raised frequency of micosatellite alterations in the post-Hodgkin's disease tumours (Behrens et al, 2000). Here, TP53 is linked to neoplasm.