An exophytic hepatic metastasis of mucinous colon cancer.

A 67-year-old woman with a chief complaint of abdominal mass was found to have an elastic-hard irregular tumour in her right lower quadrant on physical examination. Laboratory results indicated mild anaemia and elevated carcinoembryonic antigen and carbohydrate antigen 19-9 levels. Colonoscopy revealed a 40-mm adenocarcinoma in her ascending colon. Computed tomography incidentally detected a low-attenuation hepatic tumour projecting from the left lateral segment, with rim enhancement under contrast imaging (Fig. 1, arrow). Ultrasonography revealed a homogeneously hypoechoic mass without through-transmission or hyperechoic rim. The mass appeared as low intensity on T1-weighted (Fig. 2A, arrowhead), high intensity with internal septation on T2-weighted (Fig. 2B, arrowhead) and low intensity on diffusion-weighted magnetic resonance imaging. Fluorodeoxyglucose (FDG)-positron emission Figure 1. Figure 2.