Using their numbers, they're projecting ~2 million out of ~330 million U.S. population in 2018 and ~3 million out of ~
380 million in 2040 incidence(s) of cancer. That'll be about a 1% rise in incidence per year.
Will that buck last 20 years' trend?
Regardless, best/most optimistic guess is that cancer incidence will rise ~1% per year (in the U.S.). When I started med school, I thought the U.S. would need half as many physicians if smoking were banned. We're in the ongoing process of that "ban" now. About 5y ago prostate cancer was nearly the most common cancer at ~250,000 cases a year. That number is on target for about ~150K/year now.
And we overdiagnose cancers in general (I know the idea of "harmless cancer," especially in axillary lymph nodes in breast cancer cases e.g., is anathema to some rad oncs, but the harmless cancer paradigm has way more intellectual validity than the
soi-disant oligometastatic paradigm. Inconvenient truth.). Lung cancer getting less and less common.
Cervical cancer getting darn rare.
But
anyway, if we keep increasing residency class sizes ~5%/year, and the cancer incidence somehow "figures out" to grow ~1% per year, and rad onc utilization stays stable at ~30% (which would buck a declining trend), in ~20 years in 2040 there will be about 1 million rad onc new patients per year for about ~12,000 radiation oncologists. Right at 83 new patients, or less, per year per rad onc (down from ~100-110 now). So even factoring in Cancer Tomorrow's "optimism," (woe betide us if instead of "flipping" to +~1% a year it continues at <0%/year) it well agrees within the bounds of my projections. My
view of the future (re: declining new pts/rad onc) is theirs, too.*
* Here's where things potentially get weird. The projections, depending on numbers chosen, show <1 new pt/year per rad onc in 20y, too. In a way, this mathematically predicts the end of radiation oncology. Sometimes mathematical predictions presage things that no one thinks are possible.