A dangerous rumor about biopsies is delaying cancer diagnoses — medical reporting from Dr. Greg Hall on where the myth came from and why it persists.
It's a rumor Dr. Greg Hall hears constantly in his Cleveland practice, and it usually surfaces in the same way: a patient is told they need a biopsy, and before they can schedule it, someone — a relative, a friend, a coworker — warns them not to go through with it. Once the air hits the tumor, the thinking goes, the cancer spreads. Better to leave it alone.
It isn't true. There is no mechanism by which exposing a tumor to air during a biopsy causes cancer to spread, and no body of research supports the idea. But the myth is old, it circulates person-to-person rather than through anything a doctor can easily correct in a fifteen-minute visit, and it has a real cost: patients who delay or skip biopsies because of it are often diagnosed later, when the cancer has already progressed on its own.
The confusion likely traces back to a kernel of real history. Biopsies decades ago were often more invasive open surgical procedures, and it wasn't unusual for a patient to learn shortly afterward that their cancer was more advanced than doctors initially thought. Without today's imaging — CT, MRI, high-resolution ultrasound — that advancement was usually already there and simply hadn't been caught yet. The biopsy revealed it; it didn't cause it. But to a family watching a loved one's diagnosis suddenly look worse right after a procedure, the two events felt connected.
A biopsy itself is a small, targeted sample — a thin needle draws out cells, or a slightly larger needle removes a sliver of tissue, sent to a lab so a pathologist can identify exactly what's present. It doesn't open up blood vessels or give cancer cells some new route to travel. What it does is answer a question doctors otherwise have to guess at: is this benign, or is it cancer, and if so, what kind and how aggressive.
That question matters more, not less, in Black communities, which already carry a heavier burden from several major cancers and are more likely to be diagnosed at a later stage than white patients nationally. Later-stage diagnosis is the single biggest reason survival odds vary so widely — a cancer caught while still localized often has a five-year survival rate approaching 99%; the same cancer diagnosed after it has spread to distant organs can fall to under a third of that. A biopsy delayed by months or years over a myth about air isn't a neutral choice. It's often the difference between those two numbers.
None of this dismisses why the myth took root. Distrust of the medical system in Black communities has real history behind it, and no one should be talked out of that skepticism with a slogan. But refusing a biopsy doesn't protect anyone from a flawed system — it just leaves a potentially treatable cancer to grow unexamined and untreated. The better response to distrust is a second opinion, a different doctor, more questions asked out loud in the exam room — not skipping the one test that tells you what you're actually dealing with.
If a doctor recommends a biopsy, the standard advice holds: ask what the procedure involves, ask what the risk actually is versus the risk of not knowing, and get it done. Early detection remains one of the most effective tools against cancer that exists. A rumor shouldn't be the reason it goes unused.
Reporting based on commentary from Dr. Greg Hall, Cleveland-based physician and founder of Better Black Health.
