4 ideas
Cancer is not an external pathogen but the body's own cells running an unchecked version of normal growth programs, driven by mutations in the same genes that govern healthy division. This means cancer cannot be eradicated like an infection without destroying the host, because its machinery is borrowed directly from our own biology.
William Halsted reasoned that if cutting out the tumor wasn't enough, cutting out more tissue—breast, muscle, lymph nodes, even bone—would catch every escaping cancer cell, leading to ever more disfiguring surgeries. Decades of data eventually showed the extra tissue removal did not improve survival, because cancer that had spread was already systemic before the knife ever touched it.
Rather than poisoning all rapidly dividing cells, drugs like Gleevec attack the precise molecular abnormality—a single aberrant protein—that drives a particular cancer's growth. This shifts treatment from indiscriminate carpet-bombing toward disabling the specific switch keeping the malignant cell alive.
Treating an illness as having a life story—an origin, a changing identity, ambitions, and adversaries across history—reveals how shifting metaphors and prevailing science shape what treatments are even imaginable in a given era. Viewing a phenomenon biographically exposes that our responses to it are products of their historical moment, not fixed truths.