ENG and hemangioma: Further single-cell characterization of the HemSC ENG+ (PROM1High/ENGHigh) and HemSC ENG− (PROM1High/ENGLow) sub-populations, and analysis of the endoglin zinc finger/promoter domain (SP/KLF)32 can differentiate the hemangioma hemangioblast from the derivative population, the HemSC (dysregulated subset) from the other stem cells present in the vascular compartment, and the inactive normal stem cell vs. the active neoplastic stem cell.