• Retinoblastoma occurs with an observed incidence of one in 18,000 live births, and 35% to 45% of cases are transmitted genetically in a dominant fashion. A retrospective analysis of Navajo Indian children during the past 15 years disclosed an incidence 2½ to three times the expected. This observation raises the possibility that silent expression of the gene for retinoblastoma occurs more frequently among the Navajo population compared with the population at large.
(Am J Dis Child 1983;137:137-138)
Berkow RL, Fleshman JK. Retinoblastoma in Navajo Indian Children. Am J Dis Child. 1983;137(2):137-138. doi:10.1001/archpedi.1983.02140280035009