Commentary on Effects of radiotherapy with concomitant and adjuvant temozolomide versus radiotherapy alone on survival in glioblastoma in a randomised phase III study: 5-year analysis of the EORTC-NCIC trial (Lancet Oncol. 2009;10:459-466).

Recently, un update of the important European Organization for Research and Treatment of Cancer study 26981 was published without correcting deficiencies that already were known and publicized in 2008. In the current commentary, the author specifies those issues to help prevent incorrect conclusions and discusses reasons why the journal that published the update dismissed a letter clarifying those shortcomings.