Between 1975 and 1983, 9434 colonoscopic examinations were performed at the University Hospital of Z  rich. @entity455 was detected in 84 @entity1 and there were 48 mucosal biopsies from 46 @entity1 . From the total of 48 biopsies only 24 (50%) showed @entity455 . The most frequent lesion encountered was groups of thin-walled dilated vessels in the lamina propria seen in 21 biopsies from 20 @entity1 . These dilated vessels are not specific but in respect of age (median 69 years), location (predominantly in the caecum and the ascending colon) and frequent multiplicity, they are suggestive of @entity2817 . Five of the 20 @entity1 suffered from @entity417 due to @entity548 . The three other positive biopsies (from two @entity1 ) revealed a tiny haemangioma in the sigmoid colon of a 28-year-old @entity1 and a few large, thick-walled probably malformed vessels in the mucosa of the caecum of a 17-year-old @entity1 . Twenty-four biopsies did not show any histologically significant @entity455 . Mucosal biopsy of @entity455 detected during routine colonoscopic examination will, if positive, most frequently simply confirm the endoscopically diagnosed @entity455 and may in rare cases show or alert suspicion to @entity455 other than @entity2817 . Definitive morphological diagnosis will however only rarely be achieved by this method of investigation.

Mucosal biopsy of @entity455 ( XXXX ) of the large bowel detected during routine colonoscopic examination.

@entity1 :: ('9606', 'Species') :: ['woman', 'patients', 'boy'] @entity455 :: ('MESH:D014652', 'Disease') :: ['vascular lesions', 'Localized vascular ectasia', 'vascular anomaly', 'vascular ectasia', 'vascular anomalies'] @entity417 :: ('MESH:D000740', 'Disease') :: ['chronic anaemia'] @entity548 :: ('MESH:D006470', 'Disease') :: ['haemorrhages'] @entity2817 :: ('MESH:D016888', 'Disease') :: ['angiodysplasia']
@entity2817 :: (MESH:D016888,Disease) :: ['angiodysplasia']
