[Long-term survival and effective treatment of synchronous liver metastases in a case of primary gastric choriocarcinoma by using hepatic arterial infusion chemotherapy, irinotecan, and cisplatin].

A 62-year-old man was admitted to our hospital because of appetite loss. Computed tomography(CT)revealed thickness of the gastric wall, multiple liver tumors, and lung nodes. Upper gastrointestinal endoscopy revealed an easy bleeding type 2 tumor at the gastric antrum. We performed distal gastrectomy to control bleeding from the gastric tumor. Histological findings from the gastric lesion indicated primary gastric choriocarcinoma(PCG). Combination chemotherapy using hepatic arterial infusion chemotherapy for synchronous liver metastases and S-1 was administered for 5 months after the operation. CT revealed that the liver metastases decreased remarkably. On the other hand, lung metastases increased. Irinotecan and cisplatin were administered. Liver metastases did not increase, as observed using imaging studies. The patient died 17 months after the operation for cachexia. PCG is a highly aggressive tumor that is often associated with liver metastasis. It is important to control liver metastasis from PCG.