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Difference between revisions of "Intramucosal colorectal carcinoma"
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Intramucosal colorectal carcinoma (view source)
Revision as of 06:29, 19 March 2018
, 06:29, 19 March 2018→See also
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[[Image:GI Organization.svg|thumb|300px|right|The layers of the GI tract from inside (mucosa) to outside (serosa/adventitia). (WC)]] | |||
'''Intramucosal colorectal carcinoma''' is a confusing term for ''high grade (colorectal) dysplasia'' that should be avoided.<ref name=pmid22943008>{{Cite journal | last1 = Fleming | first1 = M. | last2 = Ravula | first2 = S. | last3 = Tatishchev | first3 = SF. | last4 = Wang | first4 = HL. | title = Colorectal carcinoma: Pathologic aspects. | journal = J Gastrointest Oncol | volume = 3 | issue = 3 | pages = 153-73 | month = Sep | year = 2012 | doi = 10.3978/j.issn.2078-6891.2012.030 | PMID = 22943008 }}</ref> | '''Intramucosal colorectal carcinoma''' is a confusing term for ''high grade (colorectal) dysplasia'' that should be avoided.<ref name=pmid22943008>{{Cite journal | last1 = Fleming | first1 = M. | last2 = Ravula | first2 = S. | last3 = Tatishchev | first3 = SF. | last4 = Wang | first4 = HL. | title = Colorectal carcinoma: Pathologic aspects. | journal = J Gastrointest Oncol | volume = 3 | issue = 3 | pages = 153-73 | month = Sep | year = 2012 | doi = 10.3978/j.issn.2078-6891.2012.030 | PMID = 22943008 }}</ref> | ||
''Intramucosal rectal carcinoma'', ''intramucosal colonic carcinoma'', ''intramucosal colonic adenocarcinoma'' | '''Intramucosal rectal carcinoma''', '''intramucosal colonic carcinoma''', '''intramucosal colonic adenocarcinoma''', '''intramucosal rectal adenocarcinoma''', '''intramucosal adenocarcinoma of the colon''', and '''colorectal adenocarcinoma in situ''' redirect here. | ||
==Background== | ==Background== | ||
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**This is different than elsewhere in the GI tract, where cancer is defined by invasion through the basement membrane, i.e. into the lamina propria. | **This is different than elsewhere in the GI tract, where cancer is defined by invasion through the basement membrane, i.e. into the lamina propria. | ||
**Rationale: atypical (cancer-like) cells in lamina propria do ''not'' have [[metastasis|metastatic]] potential as there are no lymphatics in the colorectal lamina propria.<ref>{{Cite journal | last1 = Lewin | first1 = MR. | last2 = Fenton | first2 = H. | last3 = Burkart | first3 = AL. | last4 = Sheridan | first4 = T. | last5 = Abu-Alfa | first5 = AK. | last6 = Montgomery | first6 = EA. | title = Poorly differentiated colorectal carcinoma with invasion restricted to lamina propria (intramucosal carcinoma): a follow-up study of 15 cases. | journal = Am J Surg Pathol | volume = 31 | issue = 12 | pages = 1882-6 | month = Dec | year = 2007 | doi = 10.1097/PAS.0b013e318057fac2 | PMID = 18043043 }}</ref> | **Rationale: atypical (cancer-like) cells in lamina propria do ''not'' have [[metastasis|metastatic]] potential as there are no lymphatics in the colorectal lamina propria.<ref>{{Cite journal | last1 = Lewin | first1 = MR. | last2 = Fenton | first2 = H. | last3 = Burkart | first3 = AL. | last4 = Sheridan | first4 = T. | last5 = Abu-Alfa | first5 = AK. | last6 = Montgomery | first6 = EA. | title = Poorly differentiated colorectal carcinoma with invasion restricted to lamina propria (intramucosal carcinoma): a follow-up study of 15 cases. | journal = Am J Surg Pathol | volume = 31 | issue = 12 | pages = 1882-6 | month = Dec | year = 2007 | doi = 10.1097/PAS.0b013e318057fac2 | PMID = 18043043 }}</ref> | ||
Note: | |||
*If one wants to differentiate ''adenocarcinoma in situ'' and ''high-grade dysplasia'': | |||
**''Adenocarcinoma in situ'' has ''invasion into the lamina propria'' and ''high-grade dysplasia'' does ''not'' have lamina propria invasion. Thus, the difference amounts to seeing a [[desmoplastic stroma]] or infiltrative cells; if one of these is present it is ''adenocarcinoma in situ'', if both are ''not'' it is ''dysplasia''. | |||
==See also== | ==See also== | ||
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*[[Traditional adenoma]]. | *[[Traditional adenoma]]. | ||
*[[Intramucosal carcinoma]]. | *[[Intramucosal carcinoma]]. | ||
*[[Colorectal cancer staging]]. | |||
*[[Pseudoinvasion]]. | |||
==References== | ==References== | ||