[Collateral formation in abdominal arterial vascular obstructions].

The development of different collateral routes in abdominal arterial occlusion is reported. In three case reports the possible collateral flow is demonstrated. It is shown that impressive occlusions do not correlate to the symptoms the patients present. Therefore it is necessary to remember the phenomenon more frequently. The therapeutic approach--in the acute stadium preferably surgical, in other cases more conservative--is not presented in this paper.