Fig. 2

(a) An inflammatory lesion located in the medium rectum in a 46-year-old man. (b) The lesion showed an absence of vascularity in the lesion but abundant vascularity in the peripheral tissue on color Doppler image; (c) the lesion presented non-enhanced on contrast-enhanced condition; (d) The biopsy needle (arrow) pass from the basal of the lesion to acquire biopsy samples both from the lesion and peripheral tissue