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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.
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References
Abramson DH, Schefler AC (2004) Update on retinoblastoma. Retina 24:828–848
Fletcher O, Easton D, Anderson K et al (2004) Lifetime risks of common cancers among retinoblastoma survivors. J Natl Cancer Inst 96:357–363
Lohmann DR (1999) RB1 gene mutations in retinoblastoma. Hum Mutat 14:283–288
Lohmann DR, Gallie BL (2004) Retinoblastoma: revisiting the model prototype of inherited cancer. Am J Med Genet C Semin Med Genet 129:23–28
Rushlow DE, Mol BM, Kennett JY, Yee S, Pajovic S, Theriault BL, Prigoda-Lee NL, Spencer C, Dimaras H, Corson TW et al (2013) Characterisation of retinoblastomas without RB1 mutations: genomic, gene expression, and clinical studies. Lancet Oncol 14:327–334
Xu XL, Singh HP, Wang L, Qi D-L, Poulos BK, Abramson DH, Jhanwar SC, Cobrinik D (2014) Rb suppresses human cone-precursor-derived retinoblastoma tumours. Nature 514:385–388
Zhang J, Benavente CA, McEvoy J, Flores-Otero J, Ding L, Chen X, Ulyanov A, Wu G, Wilson M, Wang J et al (2012) A novel retinoblastoma therapy from genomic and epigenetic analyses. Nature 481:329
See Also
(2012) Allele. In: Schwab M (ed) Encyclopedia of cancer, 3rd edn. Springer, Berlin/Heidelberg, p 137. doi:10.1007/978-3-642-16483-5_6570
(2012) Autosomal dominant. In: Schwab M (ed) Encyclopedia of cancer, 3rd edn. Springer, Berlin/Heidelberg, p 323. doi:10.1007/978-3-642-16483-5_489
(2012) Germline mutation. In: Schwab M (ed) Encyclopedia of cancer, 3rd edn. Springer, Berlin/Heidelberg, p 1544. doi:10.1007/978-3-642-16483-5_2404
(2012) Hypermethylation. In: Schwab M (ed) ncyclopedia of cancer, 3rd edn. Springer, Berlin/Heidelberg, p 1784. doi:10.1007/978-3-642-16483-5_2910
(2012) Loss of heterozygosity. In: Schwab M (ed) encyclopedia of cancer, 3rd edn. Springer, Berlin/Heidelberg, pp 2075–2076. doi:10.1007/978-3-642-16483-5_3415
(2012) Penetrance. In: Schwab M (ed) Encyclopedia of cancer, 3rd edn. Springer, Berlin/Heidelberg, p 2806. doi:10.1007/978-3-642-16483-5_4437
(2012) Point mutation. In: Schwab M (ed) Encyclopedia of cancer, 3rd edn. Springer, Berlin/Heidelberg, p 2934. doi:10.1007/978-3-642-16483-5_4653
(2012) RB1. In: Schwab M (ed) Encyclopedia of cancer, 3rd edn. Springer, Berlin/Heidelberg, p 3189. doi:10.1007/978-3-642-16483-5_4964
(2012) Sporadic. In: Schwab M (ed) Encyclopedia of cancer, 3rd edn. Springer, Berlin/Heidelberg, p 3487. doi:10.1007/978-3-642-16483-5_5458
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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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