Arquivos para o 'IMAGENS ENDOSCĂPICAS' Categoria
Angiodysplasia is a vascular lesion of the GI tract that is frequently localised in the right colon, the stomach and the duodenum. Multiple locations of angiodysplasia are frequently observed. In a retrospective study, angiodysplasia caused 24% of the initial hemorrhage in CRF (chronic renal failure)Â and 53% of the recurrent GI bleeding. Other studies found that these lesions were an infrequent cause of GI bleeding.Â The incidence of angiodysplasia may be underestimated in CRF patients in the literature and there may be a need for prospective studies performing systematic screening endoscopy. The prevalence of angiodysplasia increases with age regardless of renal function. The average age of patients with angiodysplasia in chronic CRF varies from 62 to 73 years, while the age of patients with renal failure and and angiodysplasia are younger. The diagnosis of angiodysplasia is made by endoscopy. It manifests as telangiectasia with a flat or slightly raised lesion and fernlike margins The endoscopic diagnosis of angiodysplasia needs an advanced instrument and experienced physician. Histopathology can help the diagnosis in atypical cases.Â Although the pathogenesis of angioÂdysplasia is still unknown, several theories suggested a vascular degenerative process accelerated by the hypoxygenation of the intestinal mucosa secondary to atherosclerotic peripheral vascular disease.
K Charfeddine et al. 2003sem comentários