GIST Specialist for Brentwood, CA
Many gastrointestinal stromal tumors are now found by accident, on a scan ordered for something else entirely. That is usually the best way to find one. Joshua Ellenhorn, MD, FACS assesses what it actually means before anyone reaches for an operation.
- Careful assessment before recommending surgery, including when not to
- Clinical Professor of Surgery, Cedars-Sinai Medical Center
- Minimally invasive resections, often same day or one overnight
- Fifteen to twenty minutes east along San Vicente
Found by Accident Is Usually Found Early
A CT for kidney stones. An endoscopy for reflux. A scan chasing something in the chest that catches the top of the abdomen. A growing number of gastrointestinal stromal tumors are discovered exactly this way, in people who felt entirely well.
That is a favourable position to be in. Tumors found before they bleed or obstruct are generally smaller, and size is one of the three variables that determine risk. It also means there is time. GIST is rarely an emergency, and the interval needed to obtain proper imaging, review the pathology, and think clearly is not an interval in which the situation deteriorates.
The risk in this situation is not delay. It is momentum, the assumption that anything found must be removed. For a small gastric tumor with a low mitotic count, structured surveillance is a defensible plan that spares an operation. Reaching that conclusion confidently, rather than defaulting to surgery, is one of the things a specialist consultation is for.
What a GIST Is
A gastrointestinal stromal tumor grows from the interstitial cells of Cajal, pacemaker cells inside the wall of the digestive tract that coordinate the contractions moving food along. It is a sarcoma, distinct from the stomach and bowel cancers most people have in mind.
Because it starts within the wall, it tends to push outward rather than into the passage, which is why it can reach a reasonable size without causing trouble. It also rarely involves lymph nodes, which is why a limited resection can be curative where a conventional gastric cancer would demand far more.
Nearly all carry a mutation in KIT, a smaller number in PDGFRA. Those faults leave a growth signal permanently switched on, and they are also the reason a targeted tablet works against GIST when it does little for other sarcomas.
What it looks like when it does cause symptoms
- Iron deficiency anemia on routine bloodwork, often the only sign
- Dark or tarry stools from slow bleeding into the bowel
- Filling up quickly at meals, or persistent bloating
- A dull ache or sense of pressure that is hard to localise
- Nausea and vomiting if the tumor starts to obstruct
The Three Numbers That Decide Everything
Size, site, and mitotic index. Those three together grade the risk, and the grade determines whether you need an operation, whether you need medication afterwards, and how closely you should be watched.
Size and site come from imaging. The mitotic index needs tissue, which is where judgment enters, because sampling a GIST carries a real hazard: rupturing the capsule can spread tumor cells through the abdomen and permanently worsen the outlook. Endoscopic ultrasound guided sampling is the controlled route where tissue is genuinely required. Where imaging is characteristic and the tumor is plainly resectable, going straight to resection often gives better information, since the whole specimen yields a far more reliable count than a needle core.
If you already have scans and a pathology report from a Brentwood physician, bring them or send them ahead. A second reading of existing material changes the plan more often than people expect, and without a single additional test.
Watch, Remove, or Treat Medically
All three are real choices. Which one fits depends on the tumor and, legitimately, on you.
Structured Surveillance
A small gastric tumor with reassuring features can be followed with imaging at defined intervals. Not a delay tactic and not a fudge, but a documented schedule with an endpoint. It spares you an operation you did not require.
Minimally Invasive Resection
Most gastric GIST come out as a wedge, taking the tumor with a cuff of wall through incisions under a centimetre. The stomach keeps its capacity, eating returns to normal within weeks, and age on its own is not a barrier.
Targeted Therapy
Where genuine cardiac or pulmonary limitations make an operation inadvisable, imatinib can control GIST for extended periods. It is a serious alternative rather than a consolation, and it is discussed openly when it applies.
What the Operation Looks Like
Recordings of real resections narrated by the surgeon who performed them. Useful if you want to understand what is actually being proposed rather than take it on trust.
Laparoscopic Resection of a Gastric GIST
A gastric GIST removed through small incisions with the capsule kept intact.
Gastric GIST Resection: A Simplified Approach
A streamlined approach that shortens operating time and recovery.
Robotic Resection of a Duodenal GIST
Duodenal GIST is one of the harder locations. Robotic assistance allows removal while sparing the pancreas and bile duct.
Sometimes the Answer Is Wait
A surgeon who only occasionally sees GIST is more likely to operate on a small one, because watching requires confidence in the grading. Volume cuts both ways, and it should mean fewer unnecessary operations as well as better ones.
Certifications and Appointments
Two American Board of Surgery certifications, a Cedars-Sinai teaching appointment, and membership of the societies that set the standards 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 foremost GIST surgeons in the United States.
His practice concentrates on complex abdominal cancers and gastrointestinal stromal tumors rather than spanning general surgery. That focus is why physicians across the Westside refer these cases specifically, and it is what allows the technical depth of his published operative videos.
He is 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 About Dr. Ellenhorn
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
From Incidental Finding to Clear Plan
Send What Exists
Call (310) 356-3792 or book online, then forward the imaging, any endoscopy report, and pathology if tissue was taken. A complete medication list is genuinely useful too.
Understand the Grade
You should leave knowing the size, the site, the mitotic index where available, and what those three imply. If the recommendation is to watch rather than operate, you will get the schedule in writing.
Proceed or Monitor
If surgery is indicated it is usually laparoscopic and usually short. If surveillance is the plan, the intervals are defined and your Brentwood physician is copied in so nothing falls through.
A Straight Run East
San Vicente Boulevard east to Beverly Hills, where it continues past Doheny, then south to 3rd Street. That is the simplest route from Brentwood and usually the fastest. From north of Sunset, Bundy or Barrington down to Wilshire then east works equally well, and from the Country Mart end, 26th Street to San Vicente is the natural line.
The office sits in the medical plaza attached to Cedars-Sinai Medical Center, so imaging, pathology review, and surgery all happen in one building rather than across three trips. Expect fifteen to twenty minutes from 90049 outside of peak traffic, and parking is in the attached structure.
Patients travelling from further afield, including Arizona and Nevada, can have imaging and pathology reviewed remotely before deciding whether to make the journey.
8635 W 3rd St, Suite 880W
Los Angeles, CA 90048
Monday to Saturday, 11:00am to 8:00pm
Closed Sunday
Frequently Asked Questions
A scan for something unrelated found a mass. How worried should I be?
I am in my seventies. Is surgery still the right answer?
What are the alternatives if I would rather not have an operation?
Does my other medication complicate GIST surgery?
How long will I be in hospital?
Will I need help at home afterwards?
How far is the office from Brentwood?
If we choose surveillance, what does it actually involve?
A Mass on a Scan Is Not Yet a Diagnosis.
If imaging in Brentwood has turned up something in the wall of your stomach or bowel, the useful next step is a specialist reading of what you already have, before any decision about surgery.
