Colorectal cancer other imaging findings: Difference between revisions
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==Overview== | ==Overview== | ||
Other imaging tests that can be used for colorectal cancer are endoscopy, PET scan, barium study, and angiography | Other imaging tests that can be used for colorectal cancer are [[endoscopy]], [[PET scan]], [[Barium|barium study]], and [[angiography]]. | ||
==Other Imaging Findings== | ==Other Imaging Findings== | ||
===Virtual colonoscopy=== | |||
=== | * It is also known as CT colonography. | ||
* | * CT colonography replaces X-ray films in the double contrast [[barium enema]] with a special [[computed tomography]] scan and requires special workstation software in order for the [[radiologist]] to interpret. | ||
* | * This technique is approaching [[colonoscopy]] in sensitivity for [[polyps]]. | ||
* However, any [[polyps]] found must still be removed by standard [[colonoscopy]].<ref name="pmid14657435">{{cite journal| author=Morrin MM, LaMont JT| title=Screening virtual colonoscopy--ready for prime time? | journal=N Engl J Med | year= 2003 | volume= 349 | issue= 23 | pages= 2261-4 | pmid=14657435 | doi=10.1056/NEJMe038181 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=14657435 }}</ref> | |||
===PET scan=== | ===PET scan=== | ||
Cancer cells in the body grow rapidly, so they absorb the radioactive sugar fluorodeoxyglucose or FDG used in [[positron emission tomography]] (PET). | * Cancer cells in the body grow rapidly, so they absorb the radioactive sugar [[fluorodeoxyglucose]] or FDG used in [[positron emission tomography]] (PET). | ||
* The location and extent of the tumor mass can be determined using a [[PET]] scan. | |||
PET scans are evolving as a very useful modality for staging and assessment of colorectal cancers. | * Also, metastatic lesions and their locations can be assessed using a [[PET scan]]. | ||
* [[PET scan|PET scans]] are evolving as a very useful modality for staging and assessment of colorectal cancers. | |||
* PET-CT scan has the advantage tissue based resolution and is useful in detecting whole body metastasis. | |||
===Barium Study=== | ===Barium Study=== | ||
First, an overnight preparation is taken to cleanse the colon. | * First, an overnight preparation is taken to cleanse the [[colon]]. | ||
* An [[enema]] containing [[barium sulfate]] is administered, then air is insufflated into the [[colon]], distending it. | |||
* The result is a thin layer of barium over the inner lining of the [[colon]] which is visible on X-ray films. | |||
* A cancer or a precancerous polyp can be detected this way. | |||
* This technique can miss the (less common) flat polyp. Barium study can be used to delineate the [[lesion]] preoperatively. | |||
==References== | ==References== |
Latest revision as of 20:42, 28 January 2019
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To view the other imaging findings of familial adenomatous polyposis (FAP), click here
To view the other imaging findings of hereditary nonpolyposis colorectal cancer (HNPCC), click here
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Saarah T. Alkhairy, M.D.
Overview
Other imaging tests that can be used for colorectal cancer are endoscopy, PET scan, barium study, and angiography.
Other Imaging Findings
Virtual colonoscopy
- It is also known as CT colonography.
- CT colonography replaces X-ray films in the double contrast barium enema with a special computed tomography scan and requires special workstation software in order for the radiologist to interpret.
- This technique is approaching colonoscopy in sensitivity for polyps.
- However, any polyps found must still be removed by standard colonoscopy.[1]
PET scan
- Cancer cells in the body grow rapidly, so they absorb the radioactive sugar fluorodeoxyglucose or FDG used in positron emission tomography (PET).
- The location and extent of the tumor mass can be determined using a PET scan.
- Also, metastatic lesions and their locations can be assessed using a PET scan.
- PET scans are evolving as a very useful modality for staging and assessment of colorectal cancers.
- PET-CT scan has the advantage tissue based resolution and is useful in detecting whole body metastasis.
Barium Study
- First, an overnight preparation is taken to cleanse the colon.
- An enema containing barium sulfate is administered, then air is insufflated into the colon, distending it.
- The result is a thin layer of barium over the inner lining of the colon which is visible on X-ray films.
- A cancer or a precancerous polyp can be detected this way.
- This technique can miss the (less common) flat polyp. Barium study can be used to delineate the lesion preoperatively.
References
- ↑ Morrin MM, LaMont JT (2003). "Screening virtual colonoscopy--ready for prime time?". N Engl J Med. 349 (23): 2261–4. doi:10.1056/NEJMe038181. PMID 14657435.