HemangioendotheliomaHemangioendothelioma, EpithelioidHemangiopericytomaNeoplasms, Vascular TissueVascular NeoplasmsHemangiosarcomaHemangiomaHemangioma, CapillaryHemangioma, CavernousGranuloma, PyogenicVascular MalformationsHemangioblastomaSarcoma, KaposiAngiofibromaAngiomatosisSplenic NeoplasmsNeoplasm Regression, SpontaneousNeovascularization, Pathologicvon Hippel-Lindau DiseaseTumor Markers, BiologicalEndothelium, LymphaticAntigens, CD31Skin NeoplasmsLiver NeoplasmsTumor BurdenTumor Necrosis Factor-alphaVon Hippel-Lindau Tumor Suppressor ProteinImmunohistochemistryTomography, X-Ray ComputedCell Line, TumorNeoplasmsVascular Endothelial Growth Factor AAngiogenesis InhibitorsMice, NudeHerpesvirus 8, HumanWilms TumorEndothelium, VascularBiopsyNeoplasms, ExperimentalGenes, Tumor SuppressorCarcinoid TumorMagnetic Resonance ImagingTumor Suppressor Protein p53Neuroendocrine TumorsTumor Suppressor ProteinsBrain NeoplasmsTumor MicroenvironmentMammary Neoplasms, Experimental