When the Crab Was Confined to One Place: Henri-François Le Dran and the Birth of Modern Staging

This sentence is, quite literally, the birth certificate of the modern idea of staging. The three letters read out as “T1, N0, M0” at every tumor board today, the treatment algorithms that determine a patient's life, the strategies of “surgery for local disease,” “surgery + lymphadenectomy for locoregional disease,” and “systemic treatment for metastatic disease” — all are branches of a tree that sprouted from that article in 1757. Le Dran could not have known this when he wrote it. But what he wrote would reshape medicine's relationship with cancer.

From Court Surgeon to the Mind of the Academy

Henri-François Le Dran was born in Paris in 1685 — eleven years after Petit, belonging to a generation that could observe Petit's bold operations on the road to radical mastectomy. His father was also a surgeon. At a time when surgery was still “a craft trying to separate itself from barbers,” Le Dran began his career in royal service: first a military surgeon, then a leading member of the Saint-Côme surgical society in Paris, then a member of the Académie des Sciences and a Fellow of the Royal Society (FRS) in January 1745. Thus, during his lifetime, Le Dran was at the center of European surgery.

His fame came from other fields before his cancer hypothesis. In 1741, he systematically described for the first time the clinical condition known as “Spigelian hernia.” His Traité des opérations de chirurgie (1749), published in those years, would become one of the essential reference works of European surgery in century 18 and would be translated into English. His experience in military surgery also gave him expertise in firearm injuries: he called the sudden state of shock observed after a gunshot wound “choquer” and thus was the person who introduced the word “shock” into medical language , namely Le Dran. That word remains one of the fundamental concepts of emergency medicine today.

But all of this experience takes second place to that fifty-four-page article of 1757.

The End of Black Bile, the Localization of the Crab

Two thousand years before Le Dran, Hippocratesnamed cancer with the word karkinos , meaning “crab,” while seeing the body as a field of balance between four fluids: blood, phlegm, yellow bile, and black bile. Cancer arose from the poisonous excess accumulating in the body of the fourth of these fluids — black bile . The disease was therefore not simply a local mass; it was the local manifestation of a systemic disorder of the entire body.

This view was expanded by Galen (130-210), who made it the official doctrine of Roman medicine; for the next thousand years it was the sole doctrine taught in Byzantine, Islamic, and European medical schools. Even while cutting out a mass in a woman's breast, medieval and Renaissance surgeons believed that what they were removing was “the tip of the iceberg.” The excess black bile they left behind would erupt again elsewhere — from the nipple, the kidneys, or near the spleen. Surgery's failure rate was proof of this, because the disease could not be resolved by a surgeon in the first place: the body's fluids had to be balanced.

In 1757, Le Dran published Mémoires avec un précis de plusieurs observations sur le cancerand shook the foundations of this belief. The conclusion distilled from the hundreds of patients he had operated on and followed throughout his life was clear: cancer was not a systemic imbalance, but a local disease that began at a single point and advanced from there. And this was important: cancer did not spread on its own. As it spread, it followed a particular route — the lymphatic pathways.

In this paragraph, almost all of modern oncology is written in invisible ink. Tumor mobility, local spread, lymph node involvement, the principle that “diseased tissue left behind grows again”, even tailoring the surgical approach to the patient's clinical presentation — it is all there. Le Dran's text is the first explicit formulation in medical history of the sentence “you will choose the surgery you perform according to the patient's stage.”

This sequence may look ordinary when you read it today, because every medical student knows it in 2026. But in 1757, this three-tier way of thinking was knowledge no one in the world had expressed in writing. The reality surgeons intuitively sensed at the operating table was being formulated for the first time as a theory in a published academy article.

The Bridge Between the Knife and the Doctrine

There is an important nuance here. As we discussed yesterday, Petit was a surgeon who cut cancer out of the body; he had discovered through observation what to do with the scalpel in his hand. Le Dran, by contrast, wrote down the theory underlying his observation. At the operating table, Petit had proved with his knife that “if you do not remove cancer's root, it returns”; Le Dran wrote the same statement on paper, explained its reason, and classified the method.

Their professional association was no coincidence. They were members of the same Academy (the Académie Royale de Chirurgie, founded in 1731). They taught in the same lecture theaters, debated at the same congresses, and trained the same colleagues. When Petit died in 1750, Le Dran was still active and was in a position to synthesize his observations. Thus, the 1757 article is the distilled collective intelligence not just of Le Dran, but of French surgery in the Enlightenment: a link in a chain combining Petit's en bloc practice, Garengeot's principle of preserving the skin, Le Cat's radical removal of the pectoral muscle, and Le Dran's own philosophy of a “graduated approach.”

Defining the Concept, Giving It a Name

A historical distinction should be highlighted here. Le Dran said “cancer spreads,” but he did not use the word we use today for this spread: metastasis . The person who would introduce the term “Métastase” into medical language was Joseph Récamier in 1829 — 72 years after Le Dran. Le Dran was describing the concept; the generation that would name it had not yet been born.

This detail is a recurring pattern in the history of science: an idea exists before the word that will name it. The same is true of “oncogene” (Bishop-Varmus, 1976), “tumor suppressor” (Knudson, 1971), and “immune checkpoint” (Allison, 1995) — the concept is first intuited, enters clinical observation, and is then given a name and canonized under that name. Le Dran's contribution in 1757 was to introduce the concept of cancer spread into science; the task of naming it would fall to others.

From 1757 to Halsted, from Halsted to Today

Le Dran died in 1770 at the age of 85. He had been at the center of medicine throughout his life, but the true impact of his 1757 article was understood long after his death. When William Halsted formulated radical mastectomy in Baltimore in 1894, he was, in fact, applying the highest tier of the algorithm Le Dran had written 137 years earlier: the whole breast + all axillary lymph nodes + the underlying pectoral muscle. The worldwide dominance of the Halsted school over the next eighty years was the direct clinical counterpart of Le Dran's doctrine that “local disease spreads through the lymphatics.”

In the second half of century 20, even when Bernard Fisher and the NSABP group developed the counterargument that “cancer is systemic; local surgery alone is insufficient,” they were actually debating within Le Dran's framework: whether cancer was local or systemic was the question Le Dran had raised in 1757. The answers changed — today we know that cancer is both local and may become systemic early through micrometastases — but the question remained the same.

The modern TNM staging system (Pierre Denoix, 1940s-50s), AJCC guidelines, the sentinel lymph node concept (after 1977), decisions on axillary dissection (the Z11 and AMAROS studies), and the pathological complete response biomarker for neoadjuvant treatment — all are extensions of Le Dran's principle that “cancer has stages; read its stage correctly.” The fifty-four pages written by a French surgeon in 1757 remain the backbone of clinical oncology three centuries later.

This article is Day 67 of the History of Cancer in 365 Days Series. The influence of Enlightenment surgery on oncology will be explored further in the coming days of the series through Morgagni (Day 68), Matthew Baillie, and Frances Burney's historically significant letter. The article takes a historical approach for a general audience; it does not provide medical treatment guidance.