Figure 2 in the article from the Journal of Pathology entitled “Cancer stem cells: problems for therapy?” by Malcolm R Alison, Susan ML Lim and Linda J Nicholson, published online on 25 October 2010 (DOI: 10.1002/path.2793) 1 in Wiley Online Library (www.onlinelibrary.wiley.com), was published without attribution to the original publication of the figure in an earlier published paper by Malcolm R Alison, Shahriar Islam and Nicholas A Wright, “Stem cells in cancer: instigators and propagators?”, which appeared in the Journal of Cell Science 2010, 123, pp. 2357–2368. The authors also apologise for the use of several passages of text from the earlier work. The Editor is satisfied that while this overlap was not good practice, there is substantial difference between the earlier and later articles and the article in the Journal of Pathology represents a substantially different work. The authors apologise for these errors.