Gastrointestinal stromal tumor CT: Difference between revisions
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**Deep ileal loops without [[superimposition]] | **Deep ileal loops without [[superimposition]] | ||
**Evaluation of surrounding [[mesentery]] | **Evaluation of surrounding [[mesentery]] | ||
[[image:GIST CT-Noncontrast image.jpg|thumb|left|CT without contrast showing an incidental finding of a small GIST in the posterior stomach wall (arrow). ([Courtesy: By Inversitus - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=33932071])]] | [[image:GIST CT-Noncontrast image.jpg|thumb|left|CT without contrast showing an incidental finding of a small GIST in the posterior stomach wall (arrow). ([Courtesy: By Inversitus - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=33932071])]] | ||
[[image:CT image of a GIST tumor in the gastric cardia.jpg|thumb|center|CT scan showing a GIST located in the gastric cardia. ([Courtesy: By Jto410 (from my radiology practice) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons])]] | [[image:CT image of a GIST tumor in the gastric cardia.jpg|thumb|center|CT scan showing a GIST located in the gastric cardia. ([Courtesy: By Jto410 (from my radiology practice) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons])]] | ||
Revision as of 23:57, 17 December 2017
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Gastrointestinal stromal tumor Microchapters |
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Differentiating Gastrointestinal stromal tumor from other Diseases |
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Diagnosis |
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Treatment |
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Case Studies |
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Gastrointestinal stromal tumor CT On the Web |
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American Roentgen Ray Society Images of Gastrointestinal stromal tumor CT |
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Directions to Hospitals Treating Gastrointestinal stromal tumor |
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Risk calculators and risk factors for Gastrointestinal stromal tumor CT |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Akshun Kalia M.B.B.S.[2]
Overview
A CT scan of the abdomen and pelvis is the imaging test of choice and an important tool in the diagnosis of gastrointestinal stromal tumor (GIST). CT scan can be used to determine the size, location and staging of GIST. A CT scan can accurately de-mark surrounding structures, multiple tumors and metastases. On a CT scan, a small GIST (< 5 cms) appears as homogeneous with clear boundaries, while a large GIST (>10cms) appears as a heterogeneous mass with irregular borders and have local or distant spread.
CT scan
A CT scan of the abdomen and pelvis is the imaging test of choice and an important tool in the diagnosis of gastrointestinal stromal tumor (GIST). However, a biopsy (endoscopic or CT guided) is the gold standard in diagnosing GIST. [1][2][3]
- CT scan can be used to determine the size, location and staging of GIST.
- A CT scan accurately de-mark surrounding structures, multiple tumors and metastases.
- The size of GIST determined by a CT scan can also be used to classify the severity of GIST.
- Small GIST (< 5 cms) are homogeneous with clear boundaries and have an intraluminal pattern of growth.
- Intermediate GIST (size of 5-10 cms) are heterogeneous with irregular borders and intra or extra-luminal pattern of growth.
- Large GISTs (>10 cms) are heterogeneous with irregular borders and have local or distant spread.
- Malignant GIST with metastasis (distant, peritoneal, omental) may have the following findings:
- Size greater than 10 cm
- Calcifications
- Irregular margins
- Heterogeneous and lobulated
- Lymphadenopathy
- Ulceration
- Extraluminal and mesenteric fat infiltration
- CT with contrast (oral) is superior to a normal CT scan. A CT with contrast can better visualize:
- Thickness of the small bowel
- Deep ileal loops without superimposition
- Evaluation of surrounding mesentery
References
- ↑ "Gastrointestinal stromal tumour".
- ↑ Tran T, Davila JA, El-Serag HB (2005). "The epidemiology of malignant gastrointestinal stromal tumors: an analysis of 1,458 cases from 1992 to 2000". Am. J. Gastroenterol. 100 (1): 162–8. doi:10.1111/j.1572-0241.2005.40709.x. PMID 15654796.
- ↑ Miettinen M, Makhlouf H, Sobin LH, Lasota J (2006). "Gastrointestinal stromal tumors of the jejunum and ileum: a clinicopathologic, immunohistochemical, and molecular genetic study of 906 cases before imatinib with long-term follow-up". Am. J. Surg. Pathol. 30 (4): 477–89. PMID 16625094.