Stomach cancer CT: Difference between revisions
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==CT== | ==CT== | ||
* CT is currently the staging modality of choice because it can help identify the primary tumor. | |||
CT is currently the staging modality of choice because it can help identify the primary tumor, | * It is best suited to evaluating widely metastatic disease, especially hepatic or adnexal metastases, ascites, or distant nodal spread, although biopsy confirmation is recommended because of the risk of false-positive findings. | ||
* Peritoneal metastases and hematogenous metastases smaller than 5 mm are frequently missed by CT in 20 percent of patients [25]. | |||
Demonstration of lesions facilitated by negative contrast agents | * CT accurately assesses the T stage of the primary tumor in 50 to 70 percent of cases [29-35]. | ||
* Sensitivity and specificity rates for regional nodal metastases range from 65 to 97, and 49 to 90 percent, respectively [36-40]. | |||
Demonstration of lesions facilitated by negative contrast agents:<ref>http://radiopaedia.org/articles/gastric-carcinoma</ref> | |||
*A polypoid mass with or without ulceration | *A polypoid mass with or without ulceration | ||
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*Ulceration: gas-filled ulcer crater within mass | *Ulceration: gas-filled ulcer crater within mass | ||
*Infiltrating carcinoma: wall thickening and loss of normal rugal fold pattern | *Infiltrating carcinoma: wall thickening and loss of normal rugal fold pattern | ||
==References== | ==References== | ||
{{Reflist|2}} | {{Reflist|2}} | ||
[[Category:Disease]] | [[Category:Disease]] | ||
Revision as of 22:19, 14 November 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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Overview
Abdominal CT scan may be helpful in the diagnosis of stomach cancer.
CT
- CT is currently the staging modality of choice because it can help identify the primary tumor.
- It is best suited to evaluating widely metastatic disease, especially hepatic or adnexal metastases, ascites, or distant nodal spread, although biopsy confirmation is recommended because of the risk of false-positive findings.
- Peritoneal metastases and hematogenous metastases smaller than 5 mm are frequently missed by CT in 20 percent of patients [25].
- CT accurately assesses the T stage of the primary tumor in 50 to 70 percent of cases [29-35].
- Sensitivity and specificity rates for regional nodal metastases range from 65 to 97, and 49 to 90 percent, respectively [36-40].
Demonstration of lesions facilitated by negative contrast agents:[1]
- A polypoid mass with or without ulceration
- Focal wall thickening with mucosal irregularity or focal infiltration of wall
- Ulceration: gas-filled ulcer crater within mass
- Infiltrating carcinoma: wall thickening and loss of normal rugal fold pattern