Inside Lenox Hill Hospital: The Art and Science of Saving the Brain
At Lenox Hill Hospital, neurosurgeons Dr. John Boockvar and Dr. David Langer are redefining the future of brain surgery through innovation, collaboration, and groundbreaking cancer research.
Among the most respected Lenox Hill brain surgeons, Dr. John Boockvar and Dr. David Langer have become internationally recognized for transforming modern neurosurgery.
From glioblastoma breakthroughs to AI-assisted surgical techniques and experimental treatments designed to cross the blood-brain barrier, the physicians behind Netflix’s Lenox Hill and Emergency NYC are changing how medicine — and hope — are delivered

Dr. John Boockvar Photography by Spencer Lasky
Inside the World of Lenox Hill Brain Surgeons
Dr. John Boockvar is one of the nation’s leading brain tumor surgeons. In addition to being the Director of the Brain Tumor Center at Lenox Hill Hospital, the star of Netflix’s Lenox Hill and Emergency NYC, Dr. Boockvar is a husband of 25 years and a father of four.
He is known for his pioneering research in glioblastoma, his ground breaking efforts to cross the blood-brain barrier, and for coining the term gritflowness to describe the balance of grit, flow, and mindfulness that is needed to perform under pressure.
Boockvar has built a reputation for blending science with humanity. We sat down with him to discuss preparation, breakthroughs, and the legacy of hope he strives to leave behind.
Grace A. Capobianco: In brain surgery, every millimeter matters. Has there ever been a moment when your preparation was truly tested in the OR?
Dr. John Boockvar: Very early in my career, I had a patient with an infectious cyst blocking the flow of spinal fluid. I was fresh out of residency, I had no surgical navigation system, no senior mentor at my shoulder, just me and the instruments.
I kept repeating to myself, “You’ve prepared for this moment.” After hours of careful tunneling through brain tissue, I found the cyst and removed it. The patient lived. That was my first real proof that preparation matters.
GAC: You often repeat “chance favors the prepared mind.” What does that mean to you?
JB: It’s simple but true. In neurosurgery, preparation is survival. You practice deliberately to develop vital muscle memory, so that when the unexpected happens you can achieve the flow state rather than a state of panic.
I even coined the term ‘gritflowness’, the blend of grit, flow, and mindfulness that ensures I can perform under pressure.
GAC: Brain tumors, especially glioblastoma, were once seen as hopeless. What has changed?
JB: For years, the prognosis was grim, median survival was about 10-15 months. Now we’re seeing patients live two, five, even ten years. That’s thanks to safer surgical techniques, Al-driven imaging and pathology, precision navigation that shortens long operations, and effective clinical trials.
All of those together are shifting the curve to give better chances for our patients.
GAC: You mentioned mRNA earlier. Can you explain for readers, how mRNA might work for cancer vaccines?
JB: Absolutely. Think of the mRNA COVID vaccines: they encoded the spike protein of the virus so the body could recognize that protein and develop antibodies to it. The idea with cancer is similar.
If we can identify a protein that’s specific to a tumor, for example a mutated HER2/neu protein in some breast cancers, we can encode that protein in mRNA and vaccinate a patient so they develop immunity to it.
That immunity could prevent relapse or perhaps even prevent cancer from developing in the first place. It’s early, but trials are underway and we’re seeing promising signals.
The big challenge for brain cancers, though, is the blood-brain barrier: you can immunize systemically, but immune cells like lymphocytes still don’t cross into the brain in large numbers. We have to find ways to get therapies past that barrier.
The Future of Brain Cancer Treatment
GAC: What is the blood-brain barrier – in plain English — and why does it matter for these therapies?
JB: The blood-brain barrier is an evolutionary protection: it keeps dangerous things in the bloodstream from entering the brain. For example, if you were bitten by a venomous snake, the toxin might stay in the bloodstream and not reach the brain.
That’s great for survival — but it’s a problem for brain cancer treatment because many drugs and immune cells that work elsewhere in the body can’t get into the brain.
So even if you generate great systemic immunity with an mRNA vaccine, you still need to find a way to get immune-activated cells or drugs across that barrier.
GAC: Your team is working on ways to overcome the barrier. What are the most promising approaches?
JB: Were attacking it on several fronts:
- Micro-catheter drug delivery — threading tiny catheters onto the door step of the brain tumor to “water” the tumor directly after opening the blood brain barrier;
- Intra-arterial radiation — techniques borrowed from liver cancer treatment to hit tumors more precisely with radioactive isotopes that kill cancer cells;Ultrasound cranial implants — an implant that allows us to ultrasound through the scalp and temporarily open the barrier so drugs can enter. In fact, we’re waiting on FDA approval for this novel trial and we should hear in about a month, and if it’s approved it could be transformational.
GAC: Where do brain tumors come from? Is there a genetic cause? Have cases increased?
JB: Most brain tumors are sporadic, meaning they happen because a cell undergoes a random mutation, it’s not usually an inherited condition. And no, incidence rates haven’t spiked; they’ve been relatively stable.
The hard truth is malignant brain cancers remain very difficult to cure, which is why extending quality survival is such an important goal.
GAC: Speaking of survival, what do your survival statistics look like — and how do you frame hope to patients?
JB: The median overall survival for the most aggressive tumors is still around 12-15 months. But we have a departmental slogan: ‘We strive for five.” Meaning we push to get every patient to five year survival.
Our goal is to push outcomes so that more patients reach meaningful milestones: a prom, a graduation, another holiday. Extending quality time — not just adding months on paper — is what keeps us going.
GAC: Are there types of brain tumors people can live with longer term?
JB: Yes. Not all brain tumors are glioblastoma. Low-grade gliomas, meningiomas, and pituitary tumors can are far more treatable; most patients live with them for decades and maintain good quality of life.
GAC: You talked about patient stories that stayed with you. Can you share one?
JB: There’s Peter, who outlived his initial prognosis by years and started the No Zero Days movement — he motivated his young children and the entire community around his NZD mantra. Another father, Denis, who lived six years after his GBM diagnosis – long enough to walk his daughter down the aisle at her prom and be at her Boston College graduation. Those moments are everything.
GAC: At Lenox Hill you’ve built a team culture that emphasizes collaboration. How does that change outcomes?
Hope, Survival, and Innovation
JB: We measure ourselves as a team. Cases are shared, mentorship is constant, and competition gives way to collaboration. The outcome is higher clinical-trial enrollment – about 75% of our patients participate in trials, compared to a 5% national average.
Clinical trials matter: they give patients access to new therapies and often better outcomes because of the extra attention and monitoring.
GAC: The pandemic was a defining moment. You were warned early, what did you see?
JB: In March 2020 I tweeted, “Shut everything down now.” We were seeing the ICU surge coming. Soon, the wards were full, families said goodbye over iPads, and we were improvising to get ventilators and dialysis machines.
It was a lesson in how to be adaptive, and it taught us to be better, faster, and even more collaborative.
GAC: Are there exciting facility updates at Lenox Hill you can share?
JB: Yes, the Goldman Pavilion, a new outpatient facility, will open in early 2027. It’s on 3rd Avenue between 76th and 77th, and Lloyd Goldman and his wife made a major gift to support it for which we are eternally grateful
. It will be a cancer mecca and there are online renderings and we’ll be moving clinical operations there when it opens.
GAC: That ultrasound cranial implant, can you explain how it works?
JB: The implant is an ultrasound-permeable cranioplasty we place in the skull. It lets us deliver ultrasound energy through the scalp in an outpatient setting to temporarily disrupt the blood-brain barrier.
That disruption allows drugs or immune cells better access to tumors. We’re hopeful about its impact, and again, FDA decision timing is imminent.
GAC: On a human note, how do you stay grounded? What keeps you going?
JB: Family, routines, and small pleasures. My four kids are incredible and my wife and I are fortunate to be able to spend so much time with them. I release stress by daily exercise and I love listening to country music.
I have an identical twin brother, who is also my sounding board. He is a recovering lawyer and president of Five Iron Golf. like to say I have good life-work balance not the other way around.
GAC: You and David (Langer) are so comfortable together, will the show return?
JB: Yes, we’re filming now.
GAC: (silly, but fun): If you could operate on any brain in history, past or present, just to understand how it worked, who would it be?
Inside Lenox Hill’s Culture of Collaboration
JB: Elon Musk. (After telling Dr. Langer replied Marcus Aurelius, laughs, adds) Bravo, I love that.
Q: Looking ahead, what legacy do you want to leave?
A: I want people to remember the culture that David Langer and I built at Lenox Hill. I do not honestly think there will ever be a department like ours. It’s not just the academic papers or procedures we have developed.
I want people to remember the incredible culture of collaboration, the community of people that seamlessly blends clinical research with compassionate care. Through this vehicle, we were able to offer our patients something so often elusive, hope and help. DTM

Lenox Hill Neurosurgeon Dr. David Langer Photography by Spencer Lasky
Dr. David Langer is one of the most recognized neurosurgeons in the world, and is Chair of Neurosurgery at Lenox Hill Hospital. DOWNTOWN’s Grace A. Capobianco speaks with him about intuition, innovation, and what it really means to hold a life in your hands.
Dr. David Langer, Chair of Neurosurgery at Lenox Hill Hospital, and star of Netflix’s Lenox Hill and Emergency NYC, is a physician who’s reshaped how medicine is practiced and perceived.
Known for his pioneering work in brain bypass and aneurysm surgery, as well as his bold approach to leadership and culture, Langer has built a department defined as much by empathy as by excellence.
Grace A. Capobianco: In brain surgery, every millimeter matters. Has there ever been a moment when your intuition guided you more than the data in front of you?
Dr. David Langer: There’s a lot of art in neurosurgery. You can over-plan, but in the OR you have to adjust to what the case gives you. As you gain confidence, you move into this flow state, where you just know the right thing to do.
That only comes after years of failure, fear, and repetition.
GAC: Leadership in medicine often means making decisions when there is no clear consensus. Can you share a time when you had to take an unpopular stance that ultimately shaped the department for the better?
DL: The Netflix series was one. Nobody wanted us to do it, too risky, too much exposure. But ! knew the truth: if people saw how we worked, it would help medicine, not hurt it. Another was how I structured pay. I refused per-case contracts.
We use fixed salaries so we compete with outside hospitals, not each other. That culture has taken us from 200 cases to nearly 1,000 a year.
GAC: Neurosurgery is one of the few fields where you’re literally holding a person’s identity in your hands. What do you think about that responsibility on a human, not just medical, level?
DL: Some of what we do is terrifying, yes. But a lot of it is straightforward when you’re well-trained and humble enough to ask for help.
The responsibility is enormous, but it’s also about being human, treating people with respect, and remembering you’re part of their story.
GAC: You and Dr. Boockvar often work side by side. What’s an unspoken rhythm you share in the OR that outsiders might never notice?
DL: We know what the other is going to do. No ego. Sometimes I say, “I’ll take this,” and other times he does.
There’s real joy in seeing each other succeed. In Sanskrit, there’s a word, mudita, sympathetic joy. That’s what we have.
GAC: Medicine is shifting from treatment to prevention. If you had the resources to build one new program at Lenox Hill to truly change the future of brain health, what would it be?
DL: Pediatrics. Certain tumors and vascular problems in kids need adult neurosurgical expertise, paired with a pediatric partner.
Creating that footprint in Manhattan could change lives.
GAC: When technology like Al and robotics enters surgery, how do you make sure the “art” of being a surgeon isn’t lost?
DL: Right now, robots in neurosurgery are mostly guides. In the future, they’ll perform operations. And that’s okay, outcomes are what matter.
Robots will make us better. Surgeons will focus on knowing when to intervene, not just how to hold the scalpel.
GAC: Burnout is a big topic in medicine. What helps you sustain passion in such a high-intensity career?
AI, Robotics, and the Future of Neurosurgery
DL: Neurosurgery has one of the lowest burnout rates. We love what we do.
The stress comes from bureaucracy, not the OR. If you anchor yourself in curiosity, craft, and helping people, not ego or money, you don’t burn out.
GAC: If you could change one cultural perception about neurosurgeons, what would it be?
DL: That everything we do is impossibly hard. Some things are; many are straightforward when you’re trained and humble. We’re not magicians, we’re human.
GAC: What book, film, or piece of art has influenced you as a surgeon or leader?
DL: Gladiator, for its stoic virtues: wisdom, courage, justice, temperance. Recently, I commissioned two large paintings from a young artist.
They reflect my own struggles and recovery in ways that words can’t. For the first time, art became a mirror for me.
GAC: Imagine yourself 20 years from now. What would make you feel your time at Lenox Hill was worthwhile?
Life Beyond the Operating Room
DL: Legacy. Seeing our younger surgeons thrive, carrying forward the culture we built. I realized, even if my career ended, the culture would endure. That’s the real accomplishment.
GAC: If you could operate on any brain in history, whose would it be?
DL: Marcus Aurelius. His Meditations shaped how I think. But no, you can’t “see” thoughts in the brain. That humility is part of the mystery. DTM

Lenox Hill brain surgeons Dr. John Boockvar and Dr. David Langer Photo by Spencer Lansky
