The article “Retinoblastoma” (March 15, 2006, page 1039) contained an error in the legend for Figure 2 on page 1041. The figure legend incorrectly identified the figure as an ultrasound B scan of the left eye rather than a computed tomography scan. The figure legend should have read as follows: “Computed tomography scan of the left eye, with a large mass filling the vitreous cavity. Areas of calcification appear as hyper-reflective spots (arrow).” The online version of this article has been corrected.