What is the most likely diagnosis? 
              
              
                
                CT Scan of the Thorax Windowed for Bone
              
                
                - Restrictive cardiomyopathy 
- Constrictive pericarditis 
- Asbestos-related pleural disease 
- Sarcoidosis 
- Mesothelioma 
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                  Answer:
               
              
                2. Constrictive Pericarditis
                 
              
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              Constrictive Pericarditis
                
              General       considerations
              
                - Defined by thickening of pericardium (>4mm)        impeding diastolic filling
- Thickened pericardium may calcify (50%)
- Calcified pericardium        almost always implies constriction, but not always 
- About 50% of calcified        pericardiums are visible on conventional radiography