Fig. 6
Gross and microscopic tumor presentation: a multiple yellowish-white submucosal lesions (arrowhead on typical ones), and some with traces of post-hemorrhage (arrow); b hematoxylin and eosin stain, magnification ×40 and ×100; c CD31 immunostain, magnification ×40 and ×100; and d podoplanin immunostain, magnification ×40 and ×100. These lymphoid structures were proven to be positive for podoplanin by immunostaining, and negative for CD31