References
1. Pomerance A. Pathological and clinical study of calcification of the mitral valve ring. J Clin Pathol.1970;23:354-361.
2. Deluca G, Correale M, Ieva R, Del Salvatore B, Gramenzi S, Di Biase M. The incidence and clinical course of caseous calcification of the mitral annulus: a prospective echocardiographic study. J Am Soc Echocardiogr. 2008;21:828-833.
3. Elgendy IY, Conti CR. Caseous calcification of the mitral annulus: a review. Clin Cardiol. 2013;36:E27-31.