Page 24 - IFSO-History-Book-Digital-File

A Lasting Legacy: The Scientific Method Above All

Scopinaro was elected Honorary Fellow of the American College of Surgeons, an honor held by
fewer than one hundred living surgeons worldwide, and was the first Honorary Member of multiple
national MBS societies. But, his greatest legacy lies not in a single operation or society, but in the
systematic, scientific way he approached MBS. He treated obesity as a disease to be understood at
the physiological level, not merely a technical problem to be solved with a mechanical solution. He
studied the BPD, and the body’s response to it, with the rigor of a physiologist, publishing
continuously from his first experimental work in 1973 until his final years.

A search of the medical literature reveals the astonishing breadth of his contribution. From
1966-2020, his name appears on more than 220 indexed publications. The timeline of his research
output shows not a flash of isolated genius but a lifelong commitment to systematic inquiry: a steady
stream of articles from the 1970s well into the 2010s. He published on everything from the detailed
mechanisms of nutrient absorption after BPD to the long-term outcomes of T2D remission, from liver
histology in obesity to the psychological effects of weight loss.
The numbers tell only part of the story. What matters is the method: the careful observation,
hypothesis-driven experimentation, honest reporting of both successes and complications,
willingness to revise his own operation based on evidence, and the insistence that results be
reproducible in other hands. He did not simply invent an operation, but created a framework for
understanding how surgical alteration of the gastrointestinal tract could produce profound
metabolic benefits, a discipline that now underpins the entire field of MBS.

The 50 Year Reckoning: Honoring the Full Truth

The extraordinary 50-year follow-up of the original BPD cohort was possible only because of
foresight. From the very first patient in 1976, he established a prospective, meticulously detailed
database, a rarity in an era when long term outcomes were often anecdotal. More importantly, he
infused in his mentees the same scientific rigor, ensuring that the database would be maintained and
analyzed long after he was gone. In 2026, five years after his death, the original pioneer cohort of
BPD patients, operated between 1976-1979, reached a potential follow up of 50 years. The team at
University of Genoa recently published the longest ever follow up study of any MBS procedure in the
Annals of Surgery [4].
The findings were sobering and essential. The 85 patients (70 women, 15 men) had a mean
preoperative age of 35 years and a mean BMI of 42.2 kg/m². All cause mortality was 29.4% (25 of 85).
Compared to the age matched Italian general population, the standardized mortality ratio was 2.62
(95% CI 1.71-3.86), meaning that mortality remained significantly elevated, similar to that of
non-operated Italians with severe obesity. Importantly, between one-third and two-fifths of all deaths
were directly or possibly related to the BPD procedure itself, including deaths from progressive
protein malnutrition occurring 15, 21, 30, and 37 years after the original operation, and deaths from
postoperative complications of revisional surgery as late as 25 years postoperatively.

On the other hand, weight loss was sustained and even progressive: percent total weight loss
increased from 31% at one year to 39% at more than 40 years. Remission of T2D was universal and
durable. However, the price was a high and persistent burden of nutritional complications. The
prevalence of any nutritional complication rose from 13% at one year to 86% at more than 40 years.
Revisions for malnutrition or intractable diarrhea were required in 20% of patients, with revisions
occurring up to 26 years after the initial procedure.

These findings do not diminish Scopinaro’s achievement. On the contrary, they honor it. He was the
first to admit that BPD was “a little too effective” for some patients, and he always insisted on life-long
follow-up. The half century data confirm that he was right: hypoabsorptive surgery offers

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