Fig. 5From: Patient-derived xenografts of different grade gliomas retain the heterogeneous histological and genetic features of human gliomasProliferation activity and vessels of the patient’s primary tumor and xenografts. Proliferation activity using Ki-67 showed high proliferation in all xenografts. Loss of human CD31 and gain of mouse CD31 on endothelial cells lining the vessel walls of xenograft tumor. Magnification ×40 for Ki67, and for CD31 20×Back to article page