has part has part has_part characteristic of has modifier abnormal myocardium layer morphology myocardium necrosis MPheno.ontology morphological changes resulting from pathological death of myocardial tissue; usually due to irreversible damage necrotic myocardium MP:0006085 If necrosis occurs in the heart or any subsection of the heart you should annotate use myocardium necrosis. Cardiac muscle necrosis should be used when the location of the cells is unknown or outside the heart. myocardial necrosis cardiac muscle necrosis abnormal necrotic myocardium