![](https://webarchive.library.unt.edu/eot2008/20081104101245im_/http://www.nci.nih.gov/images/spacer.gif) |
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(REH-tih-noh-blas-TOH-muh)
![](https://webarchive.library.unt.edu/eot2008/20081104101245im_/http://www.nci.nih.gov/images/spacer.gif)
| Cancer that forms in the tissues of the retina (the light-sensitive layers of nerve tissue at the back of the eye). Retinoblastoma usually occurs in children younger than 5 years. It may be hereditary or nonhereditary (sporadic). |
Previous Definitions: | resveratrol, retch, Retin-A, Retin-A-Micro, retina | Next Definitions: | retinoic acid, retinoid, retinol, retinyl palmitate, retromolar trigone |
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