Gastrointestinal stromal tumor CT: Difference between revisions
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==CT scan== | ==CT scan== | ||
Appearance of GIST on a CT scan vary with size and location. Typically the mass is of soft tissue density with central areas of lower density when necrosis is present (usually in larger tumours). Enhancement is typically peripheral (due to central necrosis). Calcification is uncommon (3%). Metastases (distant, peritoneal, omental) or direct invasion into adjacent organs may be seen in more aggressive lesions. Lymph node enlargement is not a feature.<ref>{{Cite web | title = Gastrointestinal stromal tumour | |||
| url = http://radiopaedia.org/articles/gastrointestinal-stromal-tumour-1}}</ref> | | url = http://radiopaedia.org/articles/gastrointestinal-stromal-tumour-1}}</ref> | ||
A CT scan of the abdomen and pelvis is an important tool in the diagnosis of GIST. Ct scan can be used to determine the size and location of the GIST. CT scan can also be used to determine the stage the | |||
Computed tomography scans of the abdomen and pelvis: | |||
Important in the diagnosis and staging of GISTs | |||
Provides comprehensive information regarding the size and location of the tumor and its relationship to adjacent structures | |||
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*irregular margins | *irregular margins | ||
*heterogeneous, lobulated | *heterogeneous, lobulated | ||
*lymphadenopathy | *lymphadenopathy | ||
*ulceration | *ulceration | ||
*extraluminal and mesenteric fat infiltration | *extraluminal and mesenteric fat infiltration | ||
CT with contrast (oral) is superior to normal CT. CT with contrast can better visualize the | CT with contrast (oral) is superior to normal CT. CT with contrast can better visualize the | ||
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*evaluation of surrounding mesentery | *evaluation of surrounding mesentery | ||
MRI is more accurate than CT for delineating rectal GISTs and in detecting liver metastasis, hemorrhage and necrosis. | MRI is more accurate than CT for delineating rectal GISTs and in detecting liver metastasis, hemorrhage and necrosis. | ||
==References== | ==References== | ||
Revision as of 14:10, 7 December 2017
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Parminder Dhingra, M.D. [2]
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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 |
Overview
Abdominal CT scan may be helpful in the diagnosis of gastrointestinal stromal tumor.
CT scan
Appearance of GIST on a CT scan vary with size and location. Typically the mass is of soft tissue density with central areas of lower density when necrosis is present (usually in larger tumours). Enhancement is typically peripheral (due to central necrosis). Calcification is uncommon (3%). Metastases (distant, peritoneal, omental) or direct invasion into adjacent organs may be seen in more aggressive lesions. Lymph node enlargement is not a feature.[1]
A CT scan of the abdomen and pelvis is an important tool in the diagnosis of GIST. Ct scan can be used to determine the size and location of the GIST. CT scan can also be used to determine the stage the
Computed tomography scans of the abdomen and pelvis: Important in the diagnosis and staging of GISTs Provides comprehensive information regarding the size and location of the tumor and its relationship to adjacent structures
Computed tomography (CT) is the imaging test of choice for diagnosing GIST.
On a CT scan, a malignant GIST with metastasis may have the following findings
- size greater than 10 cm
- calcifications
- irregular margins
- heterogeneous, lobulated
- lymphadenopathy
- ulceration
- extraluminal and mesenteric fat infiltration
CT with contrast (oral) is superior to normal CT. CT with contrast can better visualize the
- thickness of the small bowel
- deep ileal loops without superimposition
- evaluation of surrounding mesentery
MRI is more accurate than CT for delineating rectal GISTs and in detecting liver metastasis, hemorrhage and necrosis.