See Shoulder (Tests)
Diagnosis should rely on clinical findings; cannot use imaging to rule-out<unk> 
May give some diagnostic information:
Narrowing of acromiohumeral space (<7mm) is most specific sign
May see humeral head sclerosis, osteophytes on undersurface of acromion/clavicle
Narrowing of acromiohumeral space (<7mm) is most specific sign
May see humeral head sclerosis, osteophytes on undersurface of acromion/clavicle
Rotator cuff tear
Traumatic/Acute:
Biceps tendinitis
Shoulder Dislocation
Medial epicondylitis
Anterior shoulder dislocation
Biceps tendon rupture
Posterior shoulder dislocation