Congenital myocardial infarction

(A) Papillary muscle with orangophillic discoloration in the center, classic for myocardial infarcts in the fetus, which tend to be multifocal and non-coronary in distribution.
(B) Wavy fibers, relatively recent myocardial infarction.
(C) Calcified focus in papillary muscle, which may be seen in Trisomy 21 or 13 or as evidence of a remote myocardial infarction.