Yes - no effusion.: Pericarditis, or "inflammation of the lining of the heart" is a clinical or histologic (microscopic) finding, not (of itself) an (gross) anatomic finding. So, you can irritate the lining without being able to see it- by drugs, viruses, etc. Only if there is a pericardial effusion (fluid from the inflammation build up around the heart) will you see something on CT or echocardiogram. TTYD.
Answered 9/15/2016
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