Appendix cancer CT scan: Difference between revisions
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==Overview== | ==Overview== | ||
Abdominal CT scan is pretty helpful in the diagnosis of appendix cancer. Findings on CT scan suggestive of appendix cancer include [finding 1], [finding 2], and [finding 3]. CT scan is one of the best imaging modalities to assess disease burden, metastatic lesions as well as disease stage. | Abdominal CT scan is pretty helpful in the diagnosis and management of appendix cancer. Findings on CT scan suggestive of appendix cancer include [finding 1], [finding 2], and [finding 3]. CT scan is one of the best imaging modalities to assess disease burden, metastatic lesions as well as disease stage. | ||
==CT scan== | ==CT scan== | ||
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**Cystic lesion | **Cystic lesion | ||
**Peritoneal involvement | **Peritoneal involvement | ||
[[Image:Appendiceal-adenocarcinoma-complicated-by-retroperitoneal-abscess.jpg|thumb|left | [[Image:Appendiceal-adenocarcinoma-complicated-by-retroperitoneal-abscess.jpg|thumb|left|300px|Appendiceal adenocarcinoma complicated by retroperitoneal abscess. Case courtesy of Dr Francis Fortin, Radiopaedia.org, rID: 58007 ]] | ||
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** There are reports in favor of diffusion weighted MRI superiority compared to CT in evaluating extent of peritoneal involvement.<ref name="pmid22302265">Low RN, Barone RM (2012) [https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=22302265 Combined diffusion-weighted and gadolinium-enhanced MRI can accurately predict the peritoneal cancer index preoperatively in patients being considered for cytoreductive surgical procedures.] ''Ann Surg Oncol'' 19 (5):1394-1401. [http://dx.doi.org/10.1245/s10434-012-2236-3 DOI:10.1245/s10434-012-2236-3] PMID: [https://pubmed.gov/22302265 22302265]</ref> | ** There are reports in favor of diffusion weighted MRI superiority compared to CT in evaluating extent of peritoneal involvement.<ref name="pmid22302265">Low RN, Barone RM (2012) [https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&retmode=ref&cmd=prlinks&id=22302265 Combined diffusion-weighted and gadolinium-enhanced MRI can accurately predict the peritoneal cancer index preoperatively in patients being considered for cytoreductive surgical procedures.] ''Ann Surg Oncol'' 19 (5):1394-1401. [http://dx.doi.org/10.1245/s10434-012-2236-3 DOI:10.1245/s10434-012-2236-3] PMID: [https://pubmed.gov/22302265 22302265]</ref> | ||
**Table and | **Table and figure below demonstrate abdominal regions as well as scoring system for PCI. | ||
[[Image:Peritoneal Carcinomatosis Index (PCI) Regions.jpg|thumb|left|'''Peritoneal Carcinomatosis Index (PCI) Regions'''|400px|right|Peritoneal Carcinomatosis Index (PCI) Regions]] | [[Image:Peritoneal Carcinomatosis Index (PCI) Regions.jpg|thumb|left|'''Peritoneal Carcinomatosis Index (PCI) Regions'''|400px|right|Peritoneal Carcinomatosis Index (PCI) Regions]] | ||
Revision as of 19:47, 22 January 2019
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Appendix cancer Microchapters |
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Diagnosis |
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Treatment |
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Appendix cancer CT scan On the Web |
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American Roentgen Ray Society Images of Appendix cancer CT scan |
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Risk calculators and risk factors for Appendix cancer CT scan |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Soroush Seifirad, M.D.[2]
Overview
Abdominal CT scan is pretty helpful in the diagnosis and management of appendix cancer. Findings on CT scan suggestive of appendix cancer include [finding 1], [finding 2], and [finding 3]. CT scan is one of the best imaging modalities to assess disease burden, metastatic lesions as well as disease stage.
CT scan
- Abdominal CT scan may be helpful in the diagnosis of appendiceal cancer. Findings on CT scan suggestive of appendix cancer include:
- Cystic lesion
- Peritoneal involvement
- Liver metastasis
- Peritoneal carcinomatosis index (PCI): a widely accepted metric for assessment of disease border in appendix cancer
- Estimated by contrast enhanced cross sectional imaging.
- Both MRI and CT scan has been used and are globally accepted imaging modalities.
- Small peritoneal seeding might be difficult to appreciate on CT.
- Sometimes it is challenging to distinguish between tumor and mucin.
- There are reports in favor of diffusion weighted MRI superiority compared to CT in evaluating extent of peritoneal involvement.[1]
- Table and figure below demonstrate abdominal regions as well as scoring system for PCI.
_Regions.jpg)
| Lesion Size Score | |
|---|---|
| LS0 | No tumor seen |
| LS1 | Tumor up to 0.5 cm |
| LS2 | Tumor up to 5 cm cm |
| LS3 | Tumor > 5 cm or confluence |
| Maximum Score = 3 | |
| Regions (0-3) | |
| 0 | Central |
| 1 | Right Upper |
| 2 | Epigasterium |
| 3 | Left Upper |
| 4 | Left Flank |
| 5 | Left Lower |
| 6 | Pelvis |
| 7 | Right Upper |
| 8 | Right Flank |
| 9 | Upper Jejunum |
| 10 | Lower Jejunum |
| 11 | Upper Illeum |
| 12 | lower Illeum |
| Maximum Score = 36 | |
| Total Maximum Score = 39 | |
- CT scan also helps in discovering distant metastatic lessons in the other organs like bone, lungs, and brain.
References
- ↑ Low RN, Barone RM (2012) Combined diffusion-weighted and gadolinium-enhanced MRI can accurately predict the peritoneal cancer index preoperatively in patients being considered for cytoreductive surgical procedures. Ann Surg Oncol 19 (5):1394-1401. DOI:10.1245/s10434-012-2236-3 PMID: 22302265