Fig. 1.

Transverse sonography at periportal region showed an irregular hypoechoic mass infiltrating into the main portal vein (MPV). Florid signals seen throughout the mass on Doppler mode

Fig. 2.

Contrast-enhanced CT in coronal sections showed irregular, heterogeneously enhancing mass (asterisk) arising from the gastric antrum infiltrating into the duodenum (D) and into the main portal vein (MPV)

Fig. 3.

A. Histopathological examination in 10 × magnification showing irregular malignant glands infiltrating fibrous stroma. B. Histopathological examination in 40 × magnification showing malignant glands (asterisk)

Fig. 4.

Contrast-enhanced CT in coronal sections 4 months later showed metallic stent (S) within a larger tumor. Increased portal vein infiltration causing formation of collateral blood supplies (arrowheads) to the liver. Presence of multiple new liver metastases (arrows)