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Fig. 10B —75-year-old man with rectal cancer. Photograph of
histopathologic section confirms presence of extramural deposit
(arrow), but its relation to vascular structure cannot be appreciated
in this axial section. Consequently, any extramural vascular invasion can
easily be overlooked by pathologist, who does not have benefit of multiple
contiguous H and E–stained sections through tumor. (H and E,
x1.5)
