In memory
Napoleon Bonaparte and Stomach Cancer: A Diagnosis From History
Historical and pathological evidence points to stomach cancer as the cause of Napoleon Bonaparte's death in 1821. Here's what stomach cancer is, from the National Cancer Institute.
Please note: this page is educational only — it is not medical advice, and it does not speculate about anyone’s health beyond reliable public reporting. For questions about your own health, talk with your healthcare team.
On screen
Napoleon Bonaparte, the French military and political leader, died in exile on the island of St. Helena on May 5, 1821, at the age of 51. An autopsy was performed the following day, and both the examining physician and British medical observers concluded that he had died of stomach cancer — the same disease that had reportedly claimed his father. Over the years, alternative theories, including arsenic poisoning, circulated. But modern reviews by teams of pathologists studying the historical autopsy records have repeatedly supported the original conclusion: advanced gastric (stomach) cancer.
His story offers a window into how a cancer diagnosis can be reconstructed from history — and a chance to learn what stomach cancer is today.
The reality
According to the National Cancer Institute, stomach (gastric) cancer is cancer that starts in the cells lining the stomach, an organ in the upper abdomen that digests food. NCI explains that nearly all stomach cancers are adenocarcinomas, which begin in the mucus-producing cells of the innermost lining of the stomach. NCI describes how adenocarcinoma of the stomach can be classified by where it forms and by how the cells look under a microscope, including an "intestinal" type and a "diffuse" type, the latter of which tends to grow and spread more quickly. NCI also notes several less common types, such as gastrointestinal neuroendocrine tumors and primary gastric lymphoma.
What the story gets right — and what to remember
Napoleon's case is a fascinating example of "retrospective diagnosis," where historians and pathologists study old records to understand an illness from centuries ago. It is worth remembering that such conclusions, however well supported, are reconstructions — and that a diagnosis from 1821 tells us nothing about any individual today. Medicine, diagnosis, and treatment have transformed since then. Historical accounts like this are for education and reflection, not medical guidance.
Awareness, screening & prevention
NCI notes that the causes of stomach cancer are not fully known, but that several risk factors may increase a person's chance of developing it. NCI also states that there is no standard screening test for stomach cancer, and it describes tests that are being studied. Its resources on stomach cancer cover causes and risk factors in more detail. A reasonable, NCI-consistent general takeaway is that persistent digestive symptoms — such as ongoing indigestion or stomach pain — are worth discussing with a healthcare professional, since many such symptoms have common, non-cancerous causes but should still be evaluated when they persist.
Turning a story into something useful
Napoleon's death has been studied for two centuries, and the enduring answer — stomach cancer — connects a distant historical figure to a disease people still face today. Honoring that connection can mean learning what stomach cancer is, understanding that persistent symptoms deserve attention, and appreciating how far medical understanding has come. Supporting free cancer education helps carry that understanding forward.
Questions to ask a healthcare team
- What are the known risk factors for stomach cancer?
- Is there a screening test for stomach cancer, and why or why not?
- Which persistent digestive symptoms are worth having evaluated?
- Where can I find reliable, plain-language information about stomach cancer?