Abstract
The patient was a 60-year-old man. He underwent a pancreaticoduodenectomy following a diagnosis of a 10-cm pancreatic tumor when he was 49 years old. In August 2011, a heterogeneous mass of 92 × 71 mm with a clear boundary was found inside liver segment S4 on abdominal ultrasound. On CT, it was a 9-cm mass with a clear boundary that stained strongly inside and at the edge in the early phase and was seen as a low density area in the late phase. Since he had undergone surgery for a pancreatic tumor 11 years earlier, the pathology specimen was re-examined and checked to see whether it was c-kit positive. The diagnosis from the previous surgery was changed to duodenal GIST from a solid, pseudopapillary tumor. With the diagnosis of liver metastases following surgery 11 years earlier for duodenal GIST, liver resection of segment S4 was performed. The tumor was 8 × 7 cm, and immunostaining was positive for CD34 and c-kit. The tumor was diagnosed as liver metastases of GIST.
