{"entity":{"id":"1869","kind":"year","name":"1869 in oncology","aka":["1869"],"tldr":"Everything OnCo dates to 1869: 2 entries, 1 landmark and 1 journal founded. Each line links to the record it was read from, so the year is a view of the corpus rather than a second copy of it.","summary":"2 dated entries in OnCo fall in 1869: 1 landmark and 1 journal founded.\n\nOf those, 2 to the year only. Most of the corpus dates a fact to the year, because that is what the source it was read from gives; regulatory events and the readout calendar are the parts that carry a full date.\n\nEverything on this page is generated from the other records. It holds no fact of its own, and it changes when they do.","asOf":"2026-09-25","links":[],"tags":[],"related":["1859","1870"],"cancers":[],"sections":[],"technologies":[],"targets":[],"drugs":[],"companies":[],"institutions":[],"pathways":[],"terms":[],"trials":[],"people":[],"bottlenecks":[],"keyPapers":[],"journals":[],"dependsOn":[],"notes":["Generated from every dated field in the corpus, not written by hand. The groups and the fields behind them are listed in src/lib/year-groups.ts; the reader is src/lib/years.ts."],"year":1869,"events":[{"group":"history","date":"1869","precision":"year","title":"Urticaria pigmentosa described","note":"Systemic mastocytosis. Nettleship and Tay describe the skin lesions; Unna links them to mast cells in 1887.","from":"systemic-mastocytosis","refs":[]},{"group":"journal","date":"1869","precision":"year","title":"Nature founded","note":"Springer Nature","from":"nature","refs":[]}]},"route":"/years/1869/","neighbours":{"year":[{"id":"1859","kind":"year","name":"1859 in oncology","route":"/years/1859/"},{"id":"1870","kind":"year","name":"1870 in oncology","route":"/years/1870/"}]}}