What is the focal abnormality demonstrated on this film?
There is a band of coarse calcification projected over the left heart.
There is a band of coarse calcification projected over the expected location of the mitral valve, to the left of midline. Prominence the the left atrial appendage, but no gross evidence of left atrial enlargement. The pulmonary trunk is clearly demonstrated and not enlarged. Normal cardiac size.
The lungs are clear although there are coarsened bronchovascular markings.