{"entity":{"id":"paper-knudson-proc-natl-acad-sci-u-s-a","kind":"paper","name":"Mutation and cancer: statistical study of retinoblastoma","aka":[],"tldr":"Paper cited by one term page, indexed on Europe PMC as PubMed record 5279523 and published in Proceedings of the National Academy of Sciences; the citing page links this DOI, which is how the record was matched.","summary":"Based upon observations on 48 cases of retinoblastoma and published reports, the hypothesis is developed that retinoblastoma is a cancer caused by two mutational events. In the dominantly inherited form, one mutation is inherited via the germinal cells and the second occurs in somatic cells. In the nonhereditary form, both mutations occur in somatic cells. The second mutation produces an average of three retinoblastomas per individual inheriting the first mutation. Using Poisson statistics, one can calculate that this number (three) can explain the occasional gene carrier who gets no tumor, those who develop only unilateral tumors, and those who develop bilateral tumors, as well as explaining instances of multiple tumors in one eye. This value for the mean number of tumors occurring in genetic carriers may be used to estimate the mutation rate for each mutation. The germinal and somatic rates for the first, and the somatic rate for the second, mutation, are approximately equal. The germinal mutation may arise in some instances from a delayed mutation.\n\nIndexed on Europe PMC as PubMed record 5279523 (DOI 10.1073/pnas.68.4.820). Matched by DOI alone: one term page cites this DOI among its external links (the pages are listed under Related), and this page was written so that the citation resolves inside OnCo. No figure has been checked by an editor.","asOf":"2026-09-22","links":[{"label":"Proc Natl Acad Sci U S A 1971","url":"https://doi.org/10.1073/pnas.68.4.820"},{"label":"PubMed","url":"https://pubmed.ncbi.nlm.nih.gov/5279523/"},{"label":"Europe PMC","url":"https://europepmc.org/article/MED/5279523"}],"tags":["europepmc-ingest"],"related":["somatic-mutation-theory"],"cancers":[],"sections":[],"technologies":[],"targets":[],"drugs":[],"companies":[],"institutions":[],"pathways":[],"terms":[],"trials":[],"people":[],"bottlenecks":[],"keyPapers":[],"journals":["pnas"],"dependsOn":[],"notes":[],"journal":"Proceedings of the National Academy of Sciences","year":1971,"doi":"10.1073/pnas.68.4.820","pmid":"5279523","authors":"Knudson AG","paperType":"observational","findings":[],"whatItMeans":"One term page on OnCo cites this paper by its DOI; this record gives the citation a page of its own so a reader can follow it without leaving OnCo. Read the abstract above alongside the citing page listed under Related; the record was created automatically from the Europe PMC entry and its figures have not been checked by hand.","caveats":["Matched to the citing OnCo records by DOI alone; the summary reproduces the Europe PMC abstract and no figure has been verified against the full paper."]},"route":"/key-papers/paper-knudson-proc-natl-acad-sci-u-s-a/","neighbours":{"term":[{"id":"somatic-mutation-theory","kind":"term","name":"Somatic mutation theory of cancer","route":"/terms/somatic-mutation-theory/"}],"journal":[{"id":"pnas","kind":"journal","name":"Proceedings of the National Academy of Sciences","route":"/journals/pnas/"}]}}