Fig. 4
From: Consensus based recommendations for diagnosis and medical management of Poland syndrome (sequence)
Transverse on the arm in external rotation. Probe placed transversely on the arm in external rotation: pectoralis major tendon (arrows) inserting on the lateral labrum of bicital groove; the tendon is located superficial to long head of the biceps (lb), short head of the biceps (sb) and coracobrachialis muscle (cb). Moving the probe medially keeping the same orientation, the pectoralis minor appears in between pectoralis major and thoracic wall, and two neurovascular bundles for pectoralis muscle are visualized (lateral pedicle white arrow head, medial pedicle black arrow head)