|Punctuate angiodysplastic lesion in the ascending colon
This part of the colon is
to angiodysplastic lesions. They present as small,
and sometimes elevated lesions. They occur either
or in groups with variable edges, sometimes clear cut
sometimes cloudy. The incidence rises with age
(3-5% of people above 60 years).
Angiodysplastic lesions can cause acute, recurrent or
chronic enteral hemorrhage (approx. 3% in rectal
hemorrhage). In young age bleeding, angiodysplastic lesions of the terminal ileum do occur rarely.
Angiodysplastic lesions are acquired malformations mostly of unknown origin.
Relations to aortic stenosis (Heyde syndrome),
arterial occlusive disease and also to v. Willebrandt syndrome are put forward by some authors,
but denied by others
There are tortuous vessel in the submucosal layer. This can be seen up to the lower ascending
colon. The magnification on the right underlines the totuosity. Histology reveals an
|Angiodysplasia in the transvers colon
picture from the transverse colon.
The lesion is a little prominent. The vessels at
the edges are clearly visible.