نتایج جستجو برای: hyperplastic polyp
تعداد نتایج: 11834 فیلتر نتایج به سال:
Design: 15 large hyperplastic polyps (>1 cm), including 4 with dysplastic foci, 10 small hyperplastic polyps (≤1 cm), and 9 gastric adenomas were evaluated for immunohistochemical expression of MGMT, MLH-1, β-catenin, p27, p16, and p53. Polyps with dysplasia or abnormal β-catenin expression were assessed for APC and β-catenin (CTNNB1) mutations. Large hyperplastic polyps and adenomas were analy...
BACKGROUND & AIMS Capsule colonoscopy is a minimally invasive imaging method. We measured the accuracy of this technology in detecting polyps 6 mm or larger in an average-risk screening population. METHODS In a prospective study, asymptomatic subjects (n = 884) underwent capsule colonoscopy followed by conventional colonoscopy (the reference) several weeks later, with an endoscopist blinded t...
OBJECTIVE To determine factors influencing the low return rate observed in a program of flexible sigmoidoscopy for average risk screening for colorectal carcinoma. METHODS Flexible sigmoidoscopy-based screening of average risk 55-64 yr olds has been ongoing since 1995. Greater than 3400 primary and 1000 follow up screening examinations have been performed. Participants with a primary screen i...
Colorectal cancer is an ideal disease to be screened. It is the second most common cancer after lung and is the most common fatal malignancy in non-smokers. Colorectal cancer arises from a benign process, an adenoma or a polyp. A polyp is probably present for 10-20 years before it becomes malignant. Not all polyps become cancerous and it is not possible to predict with certainty which ones carr...
AbsractGastritis cystic polyposa is a rare and peculiar polypoid lesion arising at a gastroenterostomysite, and almost always on the gastric side. It is characterized by elongationof the gastric foveolae along with hyperplasia and cystic dilatation of the gastricglands extending into the submucosal layer. Esophagogastroduodenoscopy in a47-year-old woman without any history of gastric operation ...
We have performed a comparative ultrasequencing study of multiple colorectal lesions obtained simultaneously from four patients. Our data show that benign lesions (adenomatous or hyperplastic polyps) contain a high mutational load. Additionally multiple synchronous colorectal lesions show non overlapping mutational signatures highlighting the degree of heterogeneity between multiple specimens i...
We introduce a new ladder of function spaces which is shown to fill in the gap between the weak Lp∞ spaces and the larger Morrey spaces, Mp. Our motivation for introducing these new spaces, denoted ∨pq, is to gain a more accurate information on (compact) embeddings of Morrey spaces in appropriate Sobolev spaces. It is here that the secondary parameter q (— and a further logarithmic refinement p...
PURPOSE The purpose is to compare the molecular characteristics of serrated adenomas (SAs) with those of conventional adenomas (CADs) and hyperplastic polyps (HPs). EXPERIMENTAL DESIGN We evaluated the proliferative activity and molecular alterations in 47 SAs (25 pure-type and 22 mixed-type), 71 CADs, and 23 HPs. RESULTS The proliferative activity of SAs, as evaluated by Ki-67 expression, ...
Ground-Coupled Heat Pumps (GCHP) are among the most efficient systems to heat and cool buildings. The high initial cost of these systems has hindered their growth in particular for residential applications. Better design methods are welcome to try to optimize the size and then the initial cost of these systems. In the field of ground heat exchanger design, the short-time behavior, which was bef...
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