Abstract:
:Two cases of atypical juvenile polyposis are described in males of 9 months and 25 years-of-age. The first was associated with congenital megacolon and presented as juvenile polyps with features suggesting mild dysplasia. In the second case six histological lesions are found: I hyperplastic polyps; 2 juvenile polyps; 3 hyperplastic polyps with adenomatous areas; 4 juvenile polyps with areas of dysplastic epithelium; 5 adenomas; and 6 adenocarcinomas. On the basis of the morphological features we propose a pathogenetic sequence of focal mucosal hyperplasia to adenoma and carcinoma through stages of non-neoplastic and non premalignant polyps. Finally, the possibility that hyperplastic epithelium can in some circumstances have a greater dysplastic potential that normal colorectal mucosa is raised.
journal_name
Histopathologyjournal_title
Histopathologyauthors
Grigioni WF,Alampi G,Martinelli G,Piccaluga Adoi
10.1111/j.1365-2559.1981.tb01798.xsubject
Has Abstractpub_date
1981-07-01 00:00:00pages
361-76issue
4eissn
0309-0167issn
1365-2559journal_volume
5pub_type
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