Hobnail Hemangioma is related to hemangioendothelioma and cutaneous fibrous histiocytoma. An important gene associated with Hobnail Hemangioma is PECAM1 (Platelet And Endothelial Cell Adhesion Molecule 1), and among its related pathways/superpathways are Angiogenesis (CST) and Markers of kidney cell lineage. Related phenotypes are muscle and homeostasis/metabolism