The PDQ cancer information summaries are reviewed regularly and updated as new information becomes available. This section describes the latest changes made to this summary as of the date above.

General Information ¹

Added text ² about the lack of benefit of retinyl palmitate or retinyl palmitate plus beta-carotene when compared to retinoic acid alone (cited Papadimitrakopoulou et al. and level of evidence: 1iiDii).