Abstract:
OBJECTIVE:Serrated adenoma (SA) consists of glands both with intraluminal projection of tall columnar cells, which resemble the terminally differentiated cells in the surface epithelium, and with concave short cells, which resemble progenitor crypt cells of the colon. The aim of this study was to clarify the relationship between the serrated architecture and proliferation/differentiation process in SAs. METHODS:The expressions of both terminally differentiated markers, such as p21, cytokeratin 20 and carbonic anhydrase I, and progenitor/proliferative markers, such as beta-catenin, CD44 and Ki-67, were immunohistochemically examined in 43 SAs and 20 tubular adenomas. RESULTS:P21-positive cells were more abundant in SAs than in tubular adenomas. Cytokeratin 20 and carbonic anhydrase I expressions were confined to the tall cells, while nuclear beta-catenin and CD44 were expressed in the short cells in SAs. The Ki-67 labeling indices were significantly lower in tall cells than in short ones. CONCLUSIONS:SAs might undergo both proliferation and terminal differentiation, which is associated with unique serrated configuration.
journal_name
Oncologyjournal_title
Oncologyauthors
Jiao YF,Nakamura S,Sugai T,Yamada N,Habano Wdoi
10.1159/000151359subject
Has Abstractpub_date
2008-01-01 00:00:00pages
127-34issue
3-4eissn
0030-2414issn
1423-0232pii
000151359journal_volume
74pub_type
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