# Johannes Fibiger

> Johannes Fibiger won the 1926 Nobel Prize in Medicine for proving that a roundworm caused stomach cancer in rats — except it didn't. The tumours were vitamin A deficiency, the conclusion mistaken, and the prize later called "one of the biggest blunders" by the awarding institute itself.

*Danish physician*

**Canonical URL:** https://fame.am/person/johannes-fibiger

## Identity
- **Profile type:** Doctor ([Wikidata](https://www.wikidata.org/entity/Q39631))
- **Category:** Doctors
- **Born:** 1867-04-23
- **Died:** 1928-01-30
- **Status:** deceased
- **Gender:** male

## Bio

Fibiger, a Danish physician and professor of anatomical pathology at the University of Copenhagen, found roundworms in wild rats in 1907 and suspected they caused the stomach cancers he observed. By 1913 he reported he could experimentally induce cancer in healthy rats using the parasite — a claim hailed at the time as "the greatest contribution to experimental medicine." He was passed over for the 1926 Nobel alongside another researcher, then retrospectively awarded it alone the following year. After his death in 1928, independent work dismantled the finding: the roundworm Gongylonema neoplasticum couldn't cause cancer, and what Fibiger had seen were non-cancerous lesions triggered by vitamin deficiency. His diphtheria research, though, laid groundwork for the controlled clinical trial.

## Fame
- **Popularity score:** 52.9 / 100
- **Momentum:** 0.0 / 100  (trend: FALLING)
- **Historical depth:** 22.0 / 100
- **Now attention:** 0.0 / 100
- **Source confidence:** 60.0 / 100
- **Profile completeness:** 60.0 / 100

## Topics
#Doctors, #Doctor, #Medicine, #Chemistry, #19th Century

## Sources
- [Wikipedia](https://en.wikipedia.org/wiki/Johannes_Fibiger)
- [Wikidata](https://www.wikidata.org/wiki/Q216324)
- [Pantheon 2.0](https://pantheon.world/profile/person/Johannes%20Fibiger)
- [ژوهانس فیبیگر](https://azb.wikipedia.org/wiki/%DA%98%D9%88%D9%87%D8%A7%D9%86%D8%B3_%D9%81%DB%8C%D8%A8%DB%8C%DA%AF%D8%B1)
- [Іаханес Андрэас Грыб Фібігер](https://be.wikipedia.org/wiki/%D0%86%D0%B0%D1%85%D0%B0%D0%BD%D0%B5%D1%81_%D0%90%D0%BD%D0%B4%D1%80%D1%8D%D0%B0%D1%81_%D0%93%D1%80%D1%8B%D0%B1_%D0%A4%D1%96%D0%B1%D1%96%D0%B3%D0%B5%D1%80)
- [Йоханес Фибигер](https://bg.wikipedia.org/wiki/%D0%99%D0%BE%D1%85%D0%B0%D0%BD%D0%B5%D1%81_%D0%A4%D0%B8%D0%B1%D0%B8%D0%B3%D0%B5%D1%80)
- [ইয়োহ্যানেস ফিবিগার](https://bn.wikipedia.org/wiki/%E0%A6%87%E0%A6%AF%E0%A6%BC%E0%A7%8B%E0%A6%B9%E0%A7%8D%E0%A6%AF%E0%A6%BE%E0%A6%A8%E0%A7%87%E0%A6%B8_%E0%A6%AB%E0%A6%BF%E0%A6%AC%E0%A6%BF%E0%A6%97%E0%A6%BE%E0%A6%B0)
- [Johannes Andreas Grib Fibiger](https://ca.wikipedia.org/wiki/Johannes_Andreas_Grib_Fibiger)
- [جۆھانس فیبگەر](https://ckb.wikipedia.org/wiki/%D8%AC%DB%86%DA%BE%D8%A7%D9%86%D8%B3_%D9%81%DB%8C%D8%A8%DA%AF%DB%95%D8%B1)
- [Johannes Fibiger](https://cs.wikipedia.org/wiki/Johannes_Fibiger)
- [Johannes Andreas Grib Fibiger](https://cy.wikipedia.org/wiki/Johannes_Andreas_Grib_Fibiger)
- [Johannes Fibiger](https://da.wikipedia.org/wiki/Johannes_Fibiger)
- [Johannes Fibiger](https://de.wikipedia.org/wiki/Johannes_Fibiger)
- [Johannes Fibiger](https://es.wikipedia.org/wiki/Johannes_Fibiger)
- [Johannes Fibiger](https://et.wikipedia.org/wiki/Johannes_Fibiger)
- [Johannes Fibiger](https://eu.wikipedia.org/wiki/Johannes_Fibiger)
- [یوهانس فیبیگر](https://fa.wikipedia.org/wiki/%DB%8C%D9%88%D9%87%D8%A7%D9%86%D8%B3_%D9%81%DB%8C%D8%A8%DB%8C%DA%AF%D8%B1)
- [Johannes Andreas Grib Fibiger](https://fi.wikipedia.org/wiki/Johannes_Andreas_Grib_Fibiger)
- [Johannes Fibiger](https://fr.wikipedia.org/wiki/Johannes_Fibiger)
- [Johannes Fibiger](https://gl.wikipedia.org/wiki/Johannes_Fibiger)
- [יוהנס אנדראס גריב פיביגר](https://he.wikipedia.org/wiki/%D7%99%D7%95%D7%94%D7%A0%D7%A1_%D7%90%D7%A0%D7%93%D7%A8%D7%90%D7%A1_%D7%92%D7%A8%D7%99%D7%91_%D7%A4%D7%99%D7%91%D7%99%D7%92%D7%A8)
- [Johannes Andreas Grib Fibiger](https://hr.wikipedia.org/wiki/Johannes_Andreas_Grib_Fibiger)
- [Johannes Fibiger](https://hu.wikipedia.org/wiki/Johannes_Fibiger)
- [Johannes Andreas Grib Fibiger](https://id.wikipedia.org/wiki/Johannes_Andreas_Grib_Fibiger)
- [Johannes Andreas Grib Fibiger](https://io.wikipedia.org/wiki/Johannes_Andreas_Grib_Fibiger)
- [يوهانس فيبيغر](https://ar.wikipedia.org/wiki/%D9%8A%D9%88%D9%87%D8%A7%D9%86%D8%B3_%D9%81%D9%8A%D8%A8%D9%8A%D8%BA%D8%B1)
- [جوهانس فيبيجر](https://arz.wikipedia.org/wiki/%D8%AC%D9%88%D9%87%D8%A7%D9%86%D8%B3_%D9%81%D9%8A%D8%A8%D9%8A%D8%AC%D8%B1)

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