Enthesopathy is commonly found in -
Rheumatoid arthritis
Rheumatic fever
Ankylosing spondylitis
Osteoarthritis
Enthesopathy

Enthesopathy is any abnormality of the site where the tendons and ligaments join the bone.
Abnormalities that can occur include inflammation (enthesitis) and calcification.
Important causes are:-


Ankylosing spondylitis      
Plantar fascitis
Other seronegative spondyloarthropaties  
 Golfer's elbow
Reiter's syndrome          
Postman's heel
Tennis elbow    
Iliotibial band syndrome