Matthew Katz, MD 🇺🇸🟦

@GeneCollector @rweichselbaum @BK_radiation @DrMalikaSiker @lemmiwenks @ASTRO_org @somedocs @MKnoll_MD @S_W_R_O @sabinbmotwanimd @PercyLeeMD @RTendulkarMD @DrWinkfield @d_golden @ChelainG Definitely. When I interviewed at @UChicago 1997, Dr. Hellman said something that still rings true: - Be a good person - Then a good doctor - Then a good oncologist - Then a good radiation oncologist - In that order #radonc

Lets bring #MedTwitter back! Introducing #HemeOncHeroes ➡️ a series about the pioneers, rebels, and visionaries who changed hematology and oncology forever! Lets dive in 👇 #HemeOncHeroes series. Story #1 In 1994, his own institutions fired him in a single week. He was 76 years old. The University of Pittsburgh fired him. The NCI fired him. He had spent forty years proving that almost every breast cancer surgery for a century had been pointless. He was right. 🧵 1/15

@BenjaminGoggin @JohnNosta Interesting. Not using this at this point.

Your doctor is probably using this AI tool, and they don't need to tell you about it. Over two-thirds of doctors use this chatbot to advise on medical questions — entering specific information about patients and cases — but few patients know about it. nbcnews.com/tech/tech-news…

The Australia social media age of 16 policy (for account creation, not viewing content!) is working as expected––usage declined substantially in the first stage, and is likely to decline further as Australia presses the companies to do better. (That will get ever easier as the tech for effective and privacy preserving methods improves, now that there’s a big market for it). A journey of a thousand miles begins with a single step, and Australia took that first step. Many more steps to come, and many more countries are setting out on that path. I want to applaud @CassSunstein and Leonardo Bursztyn for highlighting something I definitely agree with: "Tipping points can be crossed, as the smoking decline shows. The lesson there is that laws are most likely to change behavior when norms move with them." We need to change societal norms and incentives if we want laws like this to succeed. They offer great advice for the countries that are setting out on the path to get a faster start. nytimes.com/2026/05/08/opi…

@VincentRK To do that, we need to coordinate. "X call" by topic, so it's not too burdensome.

We need influential medical experts to be active here on X. We can help by providing good medical information and updates for patients and colleagues. We can network. We can counter misinformation. Clarify complex questions. Share accomplishments and publications. And more. I learn every day. Although X has is not the same as the amazing platform Twitter used to be, it’s still the Number one social media platform for medicine. I’m happy to be here.

ARE the reason

Beautiful mornings like this or the reason I love getting up early to go to work #sunrise #radonc

Walking ~7000 steps/day vs. ~2000 steps/day is associated with: - 47% lower all-cause mortality - 47% lower cardiovascular disease mortality - 37% lower cancer mortality - 38% lower dementia risk - 22% lower depression If you care about your health, start walking.

Why is there such obsession with extending lifespan when the bigger issue is that average healthspan is 65 years and there are no data (except in super-centenarians) that longer lifespan = longer healthspan (known as compression of morbidity)?

"AI is replacing developers" is the most popular take on the internet right now. Microsoft just published data that says the opposite. US software developer employment hit a record 2.2 million in 2025. Up 8.5% from the year before. Early 2026 data shows it's STILL climbing. At the same time, coding output exploded. Code pushes on GitHub increased 78% year over year globally. Developers aren't doing less. They're shipping more, faster. The logic is simple. When AI makes building software cheaper, companies don't fire developers. They build more software. More products, more features, more use cases that weren't worth the cost before. The demand for software was always bigger than the supply of people who could build it. AI didn't shrink the workforce. It uncapped the backlog. This is the pattern nobody talks about. Productivity tools don't eliminate jobs when demand is elastic. Spreadsheets didn't kill accountants. They created millions of finance roles that didn't exist before. The people most at risk aren't developers who use AI. They're developers who refuse to. If you're learning to build with AI right now, you're not replacing yourself. You're positioning yourself at the front of the biggest expansion in software hiring we've ever seen.

@DigiaimoRon @TuftsMedicalCtr @ElliotHealthSys @ConcordHospital Thanks Ron! Good to see you. I hope all is well

@subatomicdoc @TuftsMedicalCtr @ElliotHealthSys @ConcordHospital 👏🏻👏🏻👏🏻👍🏻👍🏻👍🏻

After two years as Interim Chair and residency Program Director at @TuftsMedicalCtr Department of Radiation Oncology, I will be returning in <4 weeks to the @ElliotHealthSys and @ConcordHospital in New Hampshire, where I started working almost 22 years ago. I am so grateful for all the amazing people I met at @TuftsMedicine, as well as my partners at all the major academic centers in greater Boston and Worcester. The past two years will be a highlight of my career. Coming from independent private practice to academics, I brought some new ideas to help Tufts. I learned even more here, providing me with a deeper appreciation for academic medicine and corporate medicine. We can learn so much from each other to lessen human suffering. I look forward to opportunities to collaborate more on the journey forward. #radonc

The @ISRSy is committed to providing evidence based guidelines to inform #SRS and #SBRT practice globally. Thanks you Dr's. Sylvia Ng and Liang Zeng from @Sunnybrook in leading this #PancreaticCancer #SBRT guideline. pubmed.ncbi.nlm.nih.gov/42103102/

@SomaSen79612182 @TuftsMedicalCtr @ElliotHealthSys @ConcordHospital Thank you Soma - I'm sorry we didn't have more time to work together @TuftsMedicalCtr but hopefully still opportunities to collaborate. Thank you for your friendship and partnership over the past several months!

@subatomicdoc @TuftsMedicalCtr @ElliotHealthSys @ConcordHospital @subatomicdoc you will be missed greatly!

@TylerSbrt @TuftsMedicalCtr @ElliotHealthSys @ConcordHospital Thanks Tyler - mixed given the departure and new start but it's the path I'm on. Looking forward to the challenges and opportunities ahead. How are you?

@subatomicdoc @TuftsMedicalCtr @ElliotHealthSys @ConcordHospital Fun to watch your journey, Matt! They will be lucky to have you again at Elliot 👏🏻👏🏻

@DrMLChua @TuftsMedicalCtr @ElliotHealthSys @ConcordHospital Thank you so much!

@subatomicdoc @TuftsMedicalCtr @ElliotHealthSys @ConcordHospital Congrats Matt!!

@andoverdoc @TuftsMedicalCtr @ElliotHealthSys @ConcordHospital Thanks Paresh! I have loved both clinical settings, I'm fortunate to have a great options. I hope you are well!

@subatomicdoc @TuftsMedicalCtr @ElliotHealthSys @ConcordHospital Welcome back Matt. The community needs you.

Powerful editorial on corporitization of medicine. 1. Trainees are not cheap labor 2. Margin focus threatens trust. 3. Leaders need to stay in touch with clinical care nejm.org/doi/full/10.10…

The optimal approach for the mgmt of brain metastases from #RenalCellCarcinoma remains unclear. To improve patient care, this collaborative #BrainMet effort of 44 experts from 26 institutions sought to standardize practical mgmt strategies: acsjournals.onlinelibrary.wiley.com/doi/10.3322/ca… @OncoAlert

@TomVargheseJr @TuftsMedicalCtr @ElliotHealthSys @ConcordHospital Thanks Tom! I hope all is well with you 🙂

@subatomicdoc @TuftsMedicalCtr @ElliotHealthSys @ConcordHospital Congrats Matt!