Real-time echo-Doppler Duplex Scanner in the evaluation of patients with Poland sequence.

In two neonates with partial Poland sequence, an infant with complete Poland sequence and his mother subclavian artery diameter and its flow velocity waveforms were determined by real-time echo-Doppler Duplex Scanner. These measurements were significantly lower than on the normal side in the same patient. Subclavian hypoplasia appears as a local vascular defect which, in addition to thoracic muscle defects and bone defects of the hand, may be one of the main components of the Poland sequence.