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Table 4 “4 view” standard assessment for evaluation of pectoralis major and minor muscle

From: Consensus based recommendations for diagnosis and medical management of Poland syndrome (sequence)

Probe Position Description
Transverse over the sternum Moving in cranio-caudal direction to demonstrate the sternal component of the pectoralis major muscle over the sternocostal junctions and comparing to the opposite side in order to detect any asymmetry (Fig. 1)
Sagittal parasternal with the upper edge of the probe on the clavicle. Moving laterally to demonstrate the clavicular component of pectoralis major. Switching color Doppler on to demonstrate the position of cephalic vein as a landmark to distinguish the clavicular component of the pectoralis major from the anterior component of deltoid (Fig. 2)
Transverse over the coracoid immediately inferior to the clavicle and medial to gleno-humeral joint On the medial side of the coracoid is possible to appreciate the tiny tendon by which pectoralis minor muscle takes origin. Moving caudally the muscle appears between the pectoralis major superficially and rib with interposed intercostal muscle on the depth (Fig. 3)
Transverse on the arm in external rotation Moving in cranio-caudal direction from the humeral head along the tendon of the long head of the biceps up to the myotendinous junction to demonstrate the overlying pectoralis major tendon and its insertion into the humerus (Fig. 4)