Jeffrey P. Greenfield MD, PhD

02/27/2026

So proud of my team for being awarded a $100k grant to develop a new open access radiology tool to help define tumor invasion throughout the brain. The fight continues! Thank you to all the CBTP supporters for your relentless support. ❤️

12/09/2025

This month I will highlight all the amazing members of the team that make our practice and caring for patients from all of the country possible.

December employee Spotlight: Gloria Harper

Many of you know her already but an official welcome to Gloria Harper our amazing new nurse practitioner on the team who started with last summer.

Gloria is a board-certified family nurse practitioner with deep expertise in caring for patients with complex neurological conditions, including Chiari malformation, tethered cord, arachnoid cysts, hydrocephalus and shunt-dependent disorders.

Dr. Harper earned her Doctor of Nursing Practice from the University of Arizona and brings over a decade of high-acuity clinical experience from leading healthcare institutions. She is deeply committed to delivering patient-centered, evidence-based neurosurgical care and ensuring that every patient feels informed, supported, and empowered throughout their treatment journey.

She provides comprehensive pre- and post-operative management and support patients through evaluation, surgery and long-term follow-up. Starting in 2026 she will be seeing certain patients independently for comprehensive evaluations, triage and follow-up of all these conditions to reduce wait times, streamline access and share her unique experience balanced with the compassionate care you expect from us all.

Please join us in welcoming Gloria to the team, we are thrilled to have her and expect you will feel the same when you have the chance to meet!

11/18/2025

Thanks Addison! Dressing up like me for career day is a sure fire way to get my attention and some love on social media. The brain is a nice touch too...TheChildrensHospitalofNewYork

10/25/2025

Thank you NYPH and CBS for highlighting these amazing girls and their persistent parents! Link to story below. 💜💜💜💜
https://www.cbsnews.com/news/chiari-malformation-brain-condition-rare-diagnosis-new-york-presbyterian/

Ashlee and Paul Higginbotham's baby wouldn't stop crying. An MRI found an unusual condition. Soon, they found three of their other children had it too.

10/21/2025

Looking forward to talking about a core topic for pediatric neurosurgeons and their patients. Appreciate the invite from the Tethered Cord Support Alliance, a wonderful advocacy organization. See you on Zoom Tues night!
https://weillcornell.zoom.us/webinar/register/WN_oAXwQSv6Scu4jn5ZB-DZoQ

08/29/2025

The most vulnerable attacked again. Really painful and sad to see this unfold in real time. We’ll continue to fight but it seems like a long road gets only longer. Visit us at: Childrensbraintumorproject.org

https://www.nytimes.com/2025/08/28/well/pediatric-brain-cancer-trial-group.html

A network dedicated to early phase trials of treatments for children with brain cancer will be phased out.

07/27/2025

As part of my well documented attemtps to re-define Chiari based on physiology rather than radiology, herniation of the brain from CSF leaks have frequently emerged during evaluations in a crucial subset of patients. You might not actually have Chiari, but simply need a world-class team to suspect, identify and fix these insidious leaks causing your brain to sag. I'm proud of my partners Gayle Salama, Ibrahim Hussain and Jared Knopman who have helped us form one of the preeminent CSF leak centers in the world at Weill Cornell Medicine. Our team gave an invited overview on a spine-focused podcast, shared with you here today! Several of my patient discussed throughout and a brief cameo at 40 minutes....Please share widely, this isn't talked about enough and is missed frequently!

https://www.youtube.com/live/XpCPSZZB8bc?si=Xa-HQRP2eZ9OdwvC

leak

The Seattle Science Foundation is a not for profit organization dedicated to advancing the quality of patient care through education, research, innovation an...

07/16/2025

10 lucky Children's Brain Tumor Project volunteers/summer interns learning about the human brain, neuroscience and neurosurgery using sheep brains. next stops: real anatomy lab and operating rooms to watch the real deal! Go to the CBTP website to learn more! Thank you Kate Rosen, MD for the assist today! https://www.childrensbraintumorproject.org/summerinternship/

07/13/2025

Academic year wrap up and kick off after my first full year as program director for the neurosurgery training program at Weill Cornell-NYPH/MSKCC. Amazing graduates (Gary, Maricruz and Rafael), amazing guest speaker and photo-bomber, Alfredo Quinones, MD, amazing celebration after graduation, and amazing new interns (Ruth and Albert). I'm lucky to be part of such a rich tradition as former graduate myself!

07/04/2025

Wishing you and your families a healthy, safe and fun holiday weekend! Let’s see if anyone beats NYC fireworks….😜🤣🥰

03/09/2025

🚨 NYC Marathon Lottery Results Are In! 🚨

Didn’t get picked? Don’t hang up your running shoes just yet—we’ve got a spot for you. 🏃‍♂️💨

Join the Children’s Brain Tumor Project TCS New York City Marathon team and run for something bigger than just 26.2 miles. Every step you take helps fund groundbreaking research to find better treatments—and a cure—for children facing brain tumors.

Don’t miss this chance. DM us or sign up now for a chance to secure your spot!
https://cbtpfoundation.org/2025-nyc-marathon/