[The diagnosis of pulmonary sequestration--the value of computed tomography].

The complex of lung sequestration is a rare but well known entity: A segment of lung tissue located almost always in the lung bases is primarily not connected to the bronchial tree and is supplied by a systemic artery. It is very important to demonstrate these vessels to avoid accidental injuries in surgery that may cause severe bleeding. For planning surgery it is important to delineate the extent of the lesion, since it may be larger than can be seen on x-ray film and there may be secondary infectious changes of the surrounding lung tissue. CT has proved very effective in this regard.