Type A

Calcification confined to LA appendage. Mitral stenosis is the underlying lesion often and is almost always associated with thrombus in the appendage

Type B

Calcification confined to the free wall of left atrium and mitral valve and is seen in advanced mitral stenosis

Type C

Small area of calcification confined to posterior wall of LA, results from the jet lesion of mitral regurgitation and termed as “McCallum’s patch”