Heart Sarcoma, also known as cardiac sarcoma, is related to kaposi sarcoma and heart fibrosarcoma. An important gene associated with Heart Sarcoma is MDM2 (MDM2 Proto-Oncogene), and among its related pathways/superpathways are Cell surface interactions at the vascular wall and Mesenchymal Stem Cells and Lineage-specific Markers. Affiliated tissues include heart and endothelial.