The authors report quite a remarkable observation of a thoracic "stealing" vascular syndrome, apparently a sequela of a previous pleural involvement. It was a patient with fainting fits in effort related to severe hemo-diversion of the sub-pleural vascular laci fed by several vascular pedicles coming from the internal mammary artery and several broncho-intercostal arterial vessels. Selective bronchial arteriography revealed these pedicles, enabling an important blood derivation in effort without corresponding venous return, with a phenomenon of low cerebral outflow; a series of embolisms in these pedicles enabled to obtain a valuable obliteration of the main ones with a complete disappearance of the clinical signs. The syndrome mentioned in this observation is related to the "stealing" vascular ones described in the level of the subclavian artery.
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