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Ultrastructural view of paraganglioma xenograft tissue. The electron micrograph, derived from a xenograft obtained by subcutaneous injection of an immortalized tympano-jugular paraganglioma cell line (PTJ64i), shows a tight neuroepithelial-like cell cluster (arrowheads, dark spots are lipofuscins) in the context of a vasculogenic tissue revealing endothelial-like cells with cytoplasmic hollowing and capillary-like structures (arrows) (bar = 5 µm).
