In a case of hypervascular metastatic liver tumor, the vascularity of prima
ry focus, pancreatic carcinoma was hypovascular. Based on the imaging findi
ngs, we thought before the operation that the two lesions were double cance
rs. Histological examination showed that the stromal volume of metastatic t
umorous tissue was richer than that of the primary focus. It was suggested
that the difference in the stromal volume was related to the difference of
the vascularity, Some factors originating in stromal cells might be involve
d in angiogenesis.