PMC3626176_01
Histomorphology. (a) HE stain 2.5x; (b) HE stain 40x. Images show tumor in relation to adjacent testicular tissue: cavernous vessel structures with prominent intraluminal papillae composed of plump rounded cells with eosinophilic cytoplasm.
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Many of these contained proteinaceous material and, hence, closely resembled cavernous lymphangiomas, except for the fact that there were prominent intraluminal papillae composed of plump rounded cells with a limited amount of eosinophilic cytoplasm (Figure 1).
Immunohistochemistry. (a) CD-31 2.5x; (b) CD-31 20x; (c) D2-40 20x; (d) ERG 40x. Images show strong nuclear positivity for ERG in the vessel lining cells, as well as the papillary structures.
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The papillaries did not show any positive staining results for D2-40 (Figure 2).