As shown in Figure 3A, BJAB tumors exhibited a solid pattern of growth with an inconspicuous stromal meshwork, confirmed by Masson's trichrome staining, and few intra-tumor vessels, as detected by CD31 immunohistochemical staining, an histopathological situation reminiscent of that observed in the majority of human NHL [27]. This evidence concerns the gene PECAM1 and non-Hodgkin lymphoma.