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Retinoblastoma

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Synonyms

Glioma retinae

Definition

Retinoblastoma (Rb, OMIM 180200) is a malignant childhood tumor of the eye that originates from photoreceptor precursor cells of the developing retina (Xu et al. 2014). Diagnosis is based on clinical signs and symptoms and is usually made in the first 3 years of life. Development of almost all Rbs is initiated by mutations that alter both alleles of the RB1 gene (Rushlow et al. 2013). In most patients with sporadic unilateral Rb, both mutations have occurred in somatic cells. Almost all patients with sporadic bilateral Rb are heterozygous for an oncogenic alteration of the RB1 gene that was either transmitted from a parent or has occurred de novo in the germ line of one parent. Individuals heterozygous for such an alteration have a heritable predisposition to development of Rb. Penetrance and expressivity of this autosomal dominant trait are variable, which may in part be explained by residual gene function of some mutant alleles.

Characteristics

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References

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See Also

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Correspondence to Dietmar Lohmann .

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Lohmann, D. (2015). Retinoblastoma. In: Schwab, M. (eds) Encyclopedia of Cancer. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-27841-9_5068-2

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  • DOI: https://doi.org/10.1007/978-3-642-27841-9_5068-2

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  • Online ISBN: 978-3-642-27841-9

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