Differential diagnosis of elbow pain

Differential diagnosis of elbow pain 
-metastatic or primary tumor 
-avascular necrosis 
-ulnar nerve entrapment at elbow 
-tendinitis of distal insertion of biceps 
-fracture
-rheumatoid arthritis 
-gout 
-osteoarthritis 
septic arthritis 
-olecranon bursitis 
-lateral epicondylitis or medial epicondylitis