Our approach
Every case of GIST requires individual planning.
We assess the location and size of the tumor, the risk of malignant behavior, whether radical removal is possible, and whether targeted therapy is needed before or after surgery. Treatment is planned by a multidisciplinary team.
What is small bowel GIST?
GIST is a tumor that arises from the stromal cells of the bowel wall rather than from the mucous membrane.
It is most often located:
- in the jejunum
- in the ileum
- less often, in the duodenum
Tumors can range from small asymptomatic lesions to large masses with a high risk of metastasis.
Why does GIST develop?
The main cause is mutations in genes that regulate cell growth, most often:
- KIT
- PDGFRA
In most cases, GIST occurs sporadically, without a hereditary predisposition.
Symptoms
In the early stages there may be no symptoms.
Possible manifestations:
- abdominal pain
- intestinal bleeding
- anemia
- a palpable mass
- weakness
- bowel obstruction
- bowel perforation (rare)
- incidental finding on CT or MRI
When to see a doctor
A consultation is recommended if:
- a small bowel tumor has been found
- GIST has been diagnosed by biopsy
- there are signs of bleeding or anemia
- the tumor is growing
- the optimal treatment strategy needs to be determined
How is the diagnosis made?
The following are used to establish the diagnosis:
- consultation with a surgical oncologist
- contrast-enhanced computed tomography
- magnetic resonance imaging when indicated
- endoscopic methods for duodenal tumors
- biopsy (when indicated)
- histological and immunohistochemical examination (CD117, DOG1, CD34, and other markers)
- molecular genetic testing when indicated
How is it treated?
The main treatment for localized GIST is radical surgical removal of the tumor.
Depending on the clinical situation, the following may be used:
- segmental resection of the small bowel
- laparoscopic resection
- open surgery for large tumors
- preoperative targeted therapy (imatinib) when indicated
- postoperative adjuvant targeted therapy
- treatment of metastatic forms of the disease
Surgical treatment
At MSI we perform:
- radical resection of small bowel GIST
- laparoscopic operations in selected patients
- open operations for locally advanced tumors
- combined resections when the tumor has invaded neighboring organs
- operations for recurrences and certain forms of metastatic disease
During surgery, special attention is paid to removing the tumor without damaging its capsule, which is one of the key principles of GIST treatment.
Recovery after treatment
After surgery, modern ERAS protocols are used, allowing faster recovery of bowel function and a shorter hospital stay.
Further treatment is determined individually depending on the risk of recurrence and the results of histological and molecular testing.
Why choose MSI
- Specialization in oncological surgery of the digestive system
- Adherence to ESMO and NCCN international guidelines
- A multidisciplinary approach
- Modern laparoscopic technology
- Comprehensive GIST treatment including targeted therapy
- Enhanced recovery protocols (ERAS)
Frequently Asked Questions
GIST is a malignant tumor with varying degrees of aggressiveness. The risk of recurrence depends on the size of the tumor, the mitotic count, its location, and whether the tumor has ruptured.
Conventional chemotherapy is practically ineffective in GIST. When indicated, targeted therapy with drugs that block KIT or PDGFRA mutations is used.
In most cases, no. GIST very rarely spreads to the lymph nodes, so standard lymph node dissection is usually not performed.
Yes, if the size and location of the tumor allow it. The final choice of approach is made individually.
The outlook depends on the risk of recurrence and the stage of the disease. With complete removal of a localized tumor and well-chosen targeted therapy when indicated, treatment results are very good, and most patients have long-term recurrence-free survival.