Extramural Venous Invasion as Prognostic Factor of Recurrence in Stage 1 and 2 Colon Cancer

Figure 1

Overview of caldesmon staining of the venous vessel wall. (a) Haematoxylin and eosin staining shows a low-power view with a nest of invasive adenocarcinoma into the pericolic adipose tissue. (b) The caldesmon staining highlights the venous vessel wall around the tumour nest. The additional staining is an invaluable aid in the diagnosis of extramural venous invasion.

(a)

(b)