Difference between revisions of "Intramucosal colorectal carcinoma"

Intramucosal colorectal carcinoma (view source)

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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.
 **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 want 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==