Specialized Care for Gastrointestinal Stromal Tumors
Dr. Joshua Ellenhorn, MD, FACS is one of the most respected GIST surgeons in the United States — a Clinical Professor of Surgery at Cedars-Sinai specializing in minimally invasive, organ-preserving tumor resection.
- High-volume GIST & sarcoma surgical experience
- Laparoscopic & robotic minimally invasive resection
- Second opinions and complex-case referrals welcome
25+ Years of Experience“After being told my tumor was inoperable elsewhere, Dr. Ellenhorn removed it laparoscopically and preserved my stomach.”
Robert M. · Gastric GIST“Dr. Ellenhorn explained every option clearly and never rushed us. His experience with GIST gave our family peace of mind.”
Sandra L. · Small Bowel GIST“From diagnosis to recovery, the care was exceptional. I was home in days, not weeks. Truly a world-class specialist.”
James P. · Duodenal GISTExpertise That Comes From Focus
Gastrointestinal stromal tumors are rare, and outcomes are closely tied to how often a surgeon treats them. Dr. Ellenhorn has built his career around the surgical management of GIST and soft-tissue sarcoma, offering patients the precision and judgment that come only from experience.
Whenever possible, he uses minimally invasive laparoscopic and robotic techniques to remove tumors completely while preserving healthy organ function — helping patients recover faster and return to their lives.
Comprehensive, Minimally Invasive GIST Care
Accurate Staging & Planning
Careful evaluation of tumor size, location, and risk to build a treatment plan tailored to you — including expert second opinions.
Laparoscopic & Robotic Resection
Organ-preserving, minimally invasive removal of gastric, small bowel, and duodenal GISTs for faster recovery.
Targeted Therapy & Follow-Up
Coordination of targeted drug therapy and long-term monitoring in partnership with your oncology team.
See the Surgery Explained
Dr. Ellenhorn maintains an educational library of real surgical videos and patient resources — including laparoscopic and robotic GIST resections — so patients and physicians can understand exactly what modern, minimally invasive care looks like.
Your Path to Expert GIST Care
Request a Consultation
Reach out online or by phone. Send your records for review — second opinions are welcome.
Personalized Plan
Dr. Ellenhorn reviews your imaging and pathology and discusses the best surgical approach for you.
Treatment & Recovery
Minimally invasive surgery when possible, with coordinated follow-up care for the long term.
Trusted by Patients Nationwide
★ 4.9 / 5 · Based on 120+ patient reviews
“After being told my tumor was inoperable elsewhere, Dr. Ellenhorn removed it laparoscopically and preserved my stomach. I am forever grateful for his skill and calm confidence.”
“Dr. Ellenhorn explained every option clearly and never rushed us. His experience with GIST gave our whole family peace of mind during a frightening time.”
“From diagnosis to recovery, the care was exceptional. The minimally invasive surgery meant I was home in days, not weeks. Truly a world-class specialist.”
Frequently Asked Questions
What is a gastrointestinal stromal tumor (GIST)?
Is a GIST cancerous?
How are GISTs treated?
Why see a dedicated GIST surgeon?
Can I get a second opinion on my GIST diagnosis?
“After being told my tumor was inoperable elsewhere, Dr. Ellenhorn removed it laparoscopically and preserved my stomach. I am forever grateful for his skill and calm confidence.”Robert M. · Gastric GIST · Los Angeles
Schedule a Consultation With a GIST Specialist
Whether you are newly diagnosed or seeking a second opinion, Dr. Ellenhorn is here to help you understand your options.
