What Are Tumor Antigens?
July 7, 2026Core Framework & Diagram The Immune Surveillance Theory
July 7, 2026
The Immune Surveillance Theory
The cancers you never developed were quietly eliminated by your immune system
By the Editors 1-min read
Your body produces cancerous cells every day. Every cell division has a probability of error; ultraviolet radiation, free radicals, and metabolic byproducts continuously damage DNA; and approximately 30 billion cell divisions happen in your body daily. So why don't most people get cancer every year?
The answer is 'immune surveillance' (Immunosurveillance). When the concept was first proposed in 1957, it was highly controversial; in the 1970s it was nearly rejected by mainstream immunology; in the 2000s it was confirmed again by precise experimental evidence and upgraded into today's 'cancer immunoediting' theoretical framework.
This is one of immunology's most dramatic theories — its rise, fall, and resurrection is not just a history of science, but the core framework for understanding what your immune system does every day and why cancer ultimately breaks through the defenses.
KEY TAKEAWAYS
01
Immune surveillance theory proposed by Burnet and Thomas in 1957, experienced the 1970s 'rejection' (misreading of nude mouse experiments) and rebirth after Schreiber's RAG2-/- mouse experiment in 2001 — a classic case of science advancing through self-correction.
02
Three defensive lines work together daily to clear large numbers of cancerous cells. Organ transplant patients (cancer risk 2–4×) and HIV/AIDS patients (specific cancer risks up to thousands-fold higher) provide the strongest epidemiological evidence for immune surveillance.
03
Four major blind spots: low immunogenicity tumors (low TMB), immune-privileged sites (brain, eye, testis), long-term chronic inflammatory environments, and immunosenescence (declining NK cell function). Immune health maintenance after forty is key to slowing surveillance efficiency decline.
04
'Enhancing surveillance' (cancer prevention) vs. 'blocking escape' (cancer treatment) are two different application levels: the former relies on regular exercise, adequate sleep, vitamin D, and oncogenic virus vaccines; the latter relies on checkpoint inhibitors and other 'brake-release' strategies.
05
'Equilibrium-phase intervention' — identifying and intervening before cancer formally escapes — is a core direction in cutting-edge tumor immunology, relying on ultrasensitive technologies like ctDNA liquid biopsy.
Art 72
The Cancer Immunoediting Theory
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Art 73
Why Does Cancer Relapse?
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