Summary of the April 7 online issue of JNCI

The April 7 online issue of the Journal of the National Cancer Institute has reports on the origin of multifocal lung cancers and on the relationship between intensive treatment and survival in bladder cancer. Also in this issue are studies on subsequent cancers in long-term survivors of retinoblastoma; the role of cytokine signaling in mouse models of gastric cancer; and the lack of association between two perfluorinated chemicals and common cancers. Last, there is a report from a workshop at the National Institutes of Health on the interrelatedness of chronic obstructive pulmonary disease and lung cancer.