Fig. 4From: Characterization of a murine xenograft model for contrast agent development in breast lesion malignancy assessmentMorphology of fully developed (5-week) MCF-7 xenograft with necrotic core and neovascular blood vessel on the surface or within the mass. There were newly-formed blood vessels on the surface of the developed xenografts identified in situ (a) and from the harvested tissue (b) and inside the tumor mass with histological H&E staining indicated by arrow heads (d), which was magnified from the green lines marked region in (c)Back to article page