GIST Specialist for Century City, CA
A gastrointestinal stromal tumor diagnosis raises two questions at once: what is this, and how much of my life does it take. Joshua Ellenhorn, MD, FACS answers both directly. His operating room is ten minutes east of Avenue of the Stars at Cedars-Sinai.
- Many gastric GIST resections are same day or one overnight
- Clinical Professor of Surgery, Cedars-Sinai Medical Center
- Laparoscopic and robotic approaches, chosen by anatomy rather than habit
- Remote review of imaging before you commit to a visit
What Removal Actually Involves
The realistic question is not whether GIST is treatable, it is how much intervention yours requires. That is settled by size, position, mitotic rate, and mutation status.
Laparoscopic Wedge Resection
For most gastric GIST, the tumor comes out with a cuff of stomach wall through incisions under a centimetre. The stomach keeps its capacity. Frequently a day case, and desk work is usually possible again inside two weeks.
Robotic Resection
Where the tumor sits against the duodenum, the pancreas, or the gastroesophageal junction, wristed instruments and stereoscopic vision earn their keep. The published duodenal case below is exactly this situation.
Medication First, Then Surgery
A bulky or awkwardly placed tumor can be shrunk with imatinib over a few months, turning a large operation into a modest one. Knowing when to wait rather than operate immediately is one of the clearest advantages of a specialist.
What You Are Actually Dealing With
GIST arises from the interstitial cells of Cajal, pacemaker cells embedded in the wall of the digestive tract that set the rhythm of the contractions moving food along. It is a sarcoma, not a carcinoma, and it behaves unlike the stomach and colon cancers most people have heard of.
Two features of that biology work in your favour. It rarely spreads to lymph nodes, so the wide clearance a gastric adenocarcinoma demands is usually unnecessary, which is why a modest wedge resection can be curative. And nearly all GIST carry a KIT or PDGFRA mutation that locks a growth signal on, which is precisely what targeted drugs were built to switch off.
Risk is graded, not binary. Size, site, and mitotic index together predict the likelihood of recurrence and drive whether you need medication after surgery. A small gastric tumor with a low mitotic count is a very different proposition from a large small bowel tumor with a high one, even though both carry the same name.
Imaging, Tissue, and Mutation Status
Most GIST appear first on a CT, a PET/CT, or an upper endoscopy. Where the imaging appearance is characteristic, a biopsy before surgery sometimes adds nothing worth the risk.
That risk is real. Because a GIST is contained by a capsule, sampling it carelessly can rupture that capsule and spread tumor cells through the abdomen, which permanently worsens the outlook. Endoscopic ultrasound guided sampling is the controlled route when tissue is genuinely needed, and it also solves the problem that these tumors sit inside the wall where a standard endoscope cannot see them.
Mutation testing then determines the drug and the dose. KIT exon 11 tumors respond well to standard dose imatinib. Exon 9 tumors often need more. PDGFRA and wild type tumors behave differently again. Skipping that test and starting treatment on assumption is a common and avoidable error.
Why This Warrants More Than a Good General Surgeon
GIST accounts for around one percent of gastrointestinal cancers. Even a busy general surgeon may encounter two or three in a career. Competence is not the issue. Repetition is.
Every choice that determines how much of your life this costs is a judgment call. Wedge or formal gastrectomy. Laparoscopic or open. Operate now or shrink first. Resect that liver deposit or control it with a drug. There is no protocol that answers these, and the difference between a two week recovery and a two month one often turns on getting them right.
Dr. Ellenhorn reads your own imaging and pathology personally and tells you what he sees. If the honest answer is that surveillance beats surgery, you will hear that too.
The Operations, on Record
Recordings of real resections narrated by the surgeon who performed them. For a procedure where technique determines your recovery, this is the credential that actually tells you something.
Laparoscopic Resection of a Gastric GIST
A gastric GIST removed through small incisions with the capsule intact.
Gastric GIST Resection: A Simplified Approach
A refined approach that shortens both operating time and recovery.
Robotic Resection of a Duodenal GIST
Duodenal GIST is among the least forgiving locations. Robotic assistance allows removal while sparing the pancreas and bile duct.
How Long Until I Am Back?
Ask for a specific recovery estimate tied to a specific operation, not a general reassurance. A surgeon who does these routinely can give you one, because he already knows which approach your tumor will need.
Three Steps From Scan to Plan
Send the File
Call (310) 356-3792 or book online, then forward CT or PET imaging, endoscopy reports, and pathology with mutation testing if done. Sending ahead means the appointment is a discussion rather than a data entry exercise.
Get Specifics
You should leave knowing which operation is proposed, whether it is minimally invasive, roughly how long the stay is, and whether medication comes before or after. Vague answers at this stage are a warning sign.
Surgery and Handover
Most gastric resections are day case or one night. You leave with a defined imaging schedule, and your oncologist receives the operative report and pathology directly if adjuvant therapy is indicated.
Board Certified and Peer Recognised
Two American Board of Surgery certifications, a Cedars-Sinai teaching appointment, and membership of the societies that write the guidelines for this disease.
- American Board of Surgery, certified in General Surgery
- American Board of Surgery, certified in Colorectal Surgery
- California State Medical License
- Florida State Medical License
Joshua Ellenhorn, MD, FACS
Dr. Ellenhorn is a surgical oncologist and Clinical Professor of Surgery at Cedars-Sinai Medical Center, and a collaborative member of the Samuel Oschin Comprehensive Cancer Institute. He is widely regarded as one of the leading GIST surgeons in the United States.
The practice is deliberately narrow, concentrating on complex abdominal cancers and gastrointestinal stromal tumors rather than the full breadth of general surgery. That is what makes the technical detail in his published operative videos possible, and why oncologists across Los Angeles and out of state refer these cases specifically.
He is board certified by the American Board of Surgery in General Surgery and Colorectal Surgery, a Fellow of the American College of Surgeons, and a member of the Society of Surgical Oncology and the American Society of Clinical Oncology. He practises with the Surgery Group of Los Angeles.
What Patients Say
Reviews left by patients treated by Dr. Ellenhorn at the Surgery Group of Los Angeles.
★★★★★I was very pleased with the office staff, they were always very pleasant and helpful. I was very impressed with Dr. Ellenhorn as well. He was very friendly and addressed all my concerns regarding my surgery and aftercare and follow up.
Terry Jackson
★★★★★The staff at the Surgery Group of Los Angeles are wonderful. They are kind, very attentive, the office is clean and I did not have to wait long at all. I cannot say enough great things about Dr. Ellenhorn. He is an excellent surgeon who is highly skilled and very knowledgeable. I cannot thank him enough for all he has done for my family and I.
Erika Frank
Ten Minutes East of Century City
From Avenue of the Stars or Constellation Boulevard, Olympic Boulevard east to La Cienega and north is the usual line, or Santa Monica Boulevard east through Beverly Hills and across to 3rd Street. From the Fox lot and the south side of the district, Pico east then north on Robertson works well. Ten to fifteen minutes either way outside of peak hours.
The office is in the medical plaza attached to Cedars-Sinai Medical Center. Imaging, pathology, and the operating rooms sit in one building, which for anyone trying to fit a cancer workup around a working week is the single most useful thing about the location.
Patients travelling from outside California, including Arizona and Nevada, can have imaging and pathology reviewed remotely before deciding whether to make the trip.
8635 W 3rd St, Suite 880W
Los Angeles, CA 90048
Monday to Saturday, 11:00am to 8:00pm
Closed Sunday
Frequently Asked Questions
How much time off work should I plan for?
Can GIST surgery genuinely be done as an outpatient?
What is the practical difference between laparoscopic and robotic?
Will I have visible scars?
How soon after diagnosis do I need to operate?
Can I fly after GIST surgery?
What if my tumor is too large for minimally invasive surgery?
Will I need imatinib, and for how long?
Do you review imaging remotely before an in person visit?
Get a Specific Answer, Not a General One.
If a scan has found a gastrointestinal stromal tumor, the useful next step is a surgeon who can tell you which operation yours needs and what it will cost you in time.
