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Article: Bottom-up histogenesis of colorectal adenomas: origin in the monocryptal adenoma and initial expansion by crypt fission

TitleBottom-up histogenesis of colorectal adenomas: origin in the monocryptal adenoma and initial expansion by crypt fission
Authors
Issue Date2003
PublisherAmerican Association for Cancer Research. The Journal's web site is located at http://cancerres.aacrjournals.org/
Citation
Cancer Research, 2003, v. 63 n. 13, p. 3819-3825 How to Cite?
AbstractThe adenoma:carcinoma sequence is well established. Understanding the molecular pathology of the adenoma is therefore important. There is great controversy within the field. The Vogelstein group champions the 'top-down' theory (colorectal adenomas arise and grow across the mucosal surface and down into the crypts), whereas other studies, including our own, propose 'bottom-up' spread. Serial sections of 40 small (<3 mm) sporadic colorectal adenomas were stained with H&E, MIB-1, and for beta-catenin. 10 early adenomas were Feulgen-stained and microdissected. We also examined the flat mucosa of three patients who had undergone colectomies for familial adenomatous polyposis (FAP) and specimens from a XO/XY individual with FAP, the latter using in situ hybridization for the Y chromosome. In the earliest sporadic adenomas, there were crypts entirely filled with adenomatous epithelium, which showed proliferative activity and nuclear localization of beta-catenin. There was a sharp cutoff between crypt epithelial cells showing nuclear beta-catenin and surface cells with membrane staining. In slightly larger lesions, adenomatous spread from above was seen. Microdissected adenomas showed multiple fission events, with proliferation distributed equally throughout. In FAP tissue, numerous isolated monocryptal adenomas, which were clonal in origin, were seen. Examination of adenomas in the XO/XY individual showed no instances of XY or XO adenomatous epithelium growing down into crypts of the other genotype. Both sporadic and FAP adenomas start as a unicryptal adenomas and grow initially by crypt fission--a bottom-up pattern. Later, in sporadic adenomas, there is evidence of growth down into adjacent crypts (top-down).
Persistent Identifierhttp://hdl.handle.net/10722/222881
ISSN
2015 Impact Factor: 8.556
2015 SCImago Journal Rankings: 5.372

 

DC FieldValueLanguage
dc.contributor.authorPreston, SL-
dc.contributor.authorWong, WM-
dc.contributor.authorChan, AOO-
dc.contributor.authorPoulsom, R-
dc.contributor.authorJeffrey, R-
dc.contributor.authorGoodlad, RA-
dc.contributor.authorMandir, N-
dc.contributor.authorElia, G-
dc.contributor.authorNovelli, M-
dc.contributor.authorBodmer, WF-
dc.contributor.authorTomlinson, IP-
dc.contributor.authorWright, NA-
dc.date.accessioned2016-02-05T07:13:53Z-
dc.date.available2016-02-05T07:13:53Z-
dc.date.issued2003-
dc.identifier.citationCancer Research, 2003, v. 63 n. 13, p. 3819-3825-
dc.identifier.issn0008-5472-
dc.identifier.urihttp://hdl.handle.net/10722/222881-
dc.description.abstractThe adenoma:carcinoma sequence is well established. Understanding the molecular pathology of the adenoma is therefore important. There is great controversy within the field. The Vogelstein group champions the 'top-down' theory (colorectal adenomas arise and grow across the mucosal surface and down into the crypts), whereas other studies, including our own, propose 'bottom-up' spread. Serial sections of 40 small (<3 mm) sporadic colorectal adenomas were stained with H&E, MIB-1, and for beta-catenin. 10 early adenomas were Feulgen-stained and microdissected. We also examined the flat mucosa of three patients who had undergone colectomies for familial adenomatous polyposis (FAP) and specimens from a XO/XY individual with FAP, the latter using in situ hybridization for the Y chromosome. In the earliest sporadic adenomas, there were crypts entirely filled with adenomatous epithelium, which showed proliferative activity and nuclear localization of beta-catenin. There was a sharp cutoff between crypt epithelial cells showing nuclear beta-catenin and surface cells with membrane staining. In slightly larger lesions, adenomatous spread from above was seen. Microdissected adenomas showed multiple fission events, with proliferation distributed equally throughout. In FAP tissue, numerous isolated monocryptal adenomas, which were clonal in origin, were seen. Examination of adenomas in the XO/XY individual showed no instances of XY or XO adenomatous epithelium growing down into crypts of the other genotype. Both sporadic and FAP adenomas start as a unicryptal adenomas and grow initially by crypt fission--a bottom-up pattern. Later, in sporadic adenomas, there is evidence of growth down into adjacent crypts (top-down).-
dc.languageeng-
dc.publisherAmerican Association for Cancer Research. The Journal's web site is located at http://cancerres.aacrjournals.org/-
dc.relation.ispartofCancer Research-
dc.subject.meshAdenoma - pathology - surgery-
dc.subject.meshAdenomatous Polyposis Coli - pathology-
dc.subject.meshColonic Neoplasms - pathology-
dc.subject.meshColonoscopy-
dc.subject.meshIntestinal Mucosa - cytology - pathology-
dc.titleBottom-up histogenesis of colorectal adenomas: origin in the monocryptal adenoma and initial expansion by crypt fission-
dc.typeArticle-
dc.identifier.emailWong, WM: wmwongg@hkucc.hku.hk-
dc.identifier.emailChan, AOO: aoochan@HKUCC.hku.hk-
dc.description.naturelink_to_OA_fulltext-
dc.identifier.pmid12839979-
dc.identifier.hkuros80842-
dc.identifier.volume63-
dc.identifier.issue13-
dc.identifier.spage3819-
dc.identifier.epage3825-
dc.publisher.placeUnited States-

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