retinoblastoma

Definition / meaning of retinoblastoma

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).

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Find More About 'retinoblastoma'

Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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