<prompt> Most common inherited childhood tumor is:LeukemiaNeuroblastomaRetinoblastomaWilms tumor  <response>: Retinoblastoma is a neuroectodermal malignancy arising from embryonic retinal cells. It is the most common intraocular tumor in pediatric patients and causes 5 of cases of childhood blindness. Retinoblastoma is the prototype of hereditary cancers due to a mutation in the retinoblastoma gene RB1, which is located on the long arm of chromosome 13 13q14. Approximately 40 of retinoblastoma are inherited. Ref: Graham D.K., Quinones R.R., Keating A.K., Maloney K., Foreman N.K., Giller R.H., Greffe B.S. 2012. Chapter 31. Neoplastic Disease. In W.W. Hay, Jr., M.J. Levin, R.R. Deterding, J.J. Ross, J.M. Sondheimer Eds, CURRENT Diagnosis Treatment: Pediatrics, 21e. 