Adenomatous Polyps
Mostrando 13-24 de 56 artigos, teses e dissertações.
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13. Incidence and significance of argentaffin and Paneth cells in some tumours of the large intestine
The incidence of argentaffin and Paneth cells in epithelial tumours of the large intestine was investigated. Argentaffin cells were found in adenomatous polyps, villus adenomas, polyposis coli, Peutz-Jehgers' polyps, juvenile polyposis, and adenocarcinomas. Paneth cells were not found in metaplastic or juvenile polyps.
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14. Ploidy studies in adenomatous polyps of the colon.
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15. Proceedings: Pseudocarcinomatous invasion in adenomatous polyps of the colon and rectum.
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16. Upper gastrointestinal pathology in familial adenomatous polyposis: results from a prospective study of 102 patients.
Multiple gastric and duodenal biopsy specimens from 102 asymptomatic patients with familial adenomatous polyposis, taken during a prospective endoscopic screening programme were examined. One hundred patients had microscopic gastroduodenal pathology, often in the absence of macroscopic lesions. Adenomas were found in 94 patients in the duodenum, in the secon
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17. Loss of Apc heterozygosity and abnormal tissue building in nascent intestinal polyps in mice carrying a truncated Apc gene.
Mutations in the APC (adenomatous polyposis coli) gene appear to be responsible for not only familial adenomatous polyposis but also many sporadic cases of gastrointestinal cancers. Using homologous recombination in mouse embryonic stem cells, we constructed mice that contained a mutant gene encoding a product truncated at a 716 (Apc delta 716). Mendelian tr
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18. Rectal bleeding and polyps.
Colorectal polyps are an important albeit uncommon cause of rectal bleeding in children. Colonoscopy promotes both rapid and accurate diagnosis and the opportunity for immediate therapeutic polypectomy. A 10 year audit of polyps diagnosed and treated endoscopically has been undertaken in the children's endoscopy unit. Twenty nine polyps were diagnosed from 7
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19. Endoscopic gastroduodenal polypectomy.
During a 6-year period from 1976 to 1982, 7346 gastrointestinal endoscopy procedures were performed in the Surgical Endoscopy Unit of Beth Israel Medical Center. This report summarizes our experience with 443 gastroduodenal polyps excised in 257 patients. Of these, 123 were male and 134 female, ranging in age from 19 to 92. The vast majority were between the
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20. Morphological range of hyperplastic polyps and carcinomas arising in hyperplastic polyps of the stomach.
A morphological range of 67 hyperplastic polyps was studied. They included polyps removed endoscopically and polyps found incidentally in resected stomachs with gastric ulcers and cancer. The hyperplastic polyps were essentially composed of cystic foveolae and pyloric type glands, lined by cells identical to those of the normal gastric mucosa. Thirty one pol
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21. Expression of HLA-DR antigen in different histological types of gastric polyp.
AIMS: To study the expression of HLA-DR antigen in the different histological types of gastric polyps. METHODS: Ninety five cases of gastric polyps were histologically classified and examined for the presence of Helicobacter pylori, and for degree and type of inflammation. Further sections were stained immunohistochemically for HLA-DR antigen expression in t
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22. Inverted hyperplastic polyposis of the colon.
AIMS: To describe and evaluate two apparently unique cases of inverted hyperplastic (metaplastic) polyposis of the colon. METHODS: The cases were analysed by standard histopathological, histochemical, and immunohistochemical techniques and the findings compared with those of regular hyperplastic polyps of the colorectum. RESULTS: Both patients were middle-ag
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23. Association between thyroid cancer of cribriform variant and familial adenomatous polyposis.
A case of a 20 year old Japanese woman who developed thyroid cancer exhibiting unusual cribriform structures while being followed up for familial adenomatous polyposis/Gardner's syndrome is reported. The patient presented with osteomas, pigmented retinal lesions, and adenomas of the duodenum and the papilla of Vater, in addition to numerous adenomatous polyp
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24. Genotype-phenotype correlations of new causative APC gene mutations in patients with familial adenomatous polyposis.
Nine new causative mutations and seven previously characterised mutations of the APC gene of patients with familial adenomatous polyposis (FAP) were analysed for any genotype-phenotype correlations. The only clear genotype-phenotype correlation found was between the position of the mutation site and the presence or absence of congenital hypertrophy of the re