Deltoid
Pectoralis major
Cephalic vein
Axillary vein
Thoracoacromial artery
Lateral pectoral nerve
Pectoralis minor
Long thoracic nerve
Serratus anterior
Subscapularis
Latissimus dorsi
Intercostobrachial nerve
Lateral cutaneous br. of 3rd intercostal nerve
Lateral thoracic artery