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JOURNAL ARTICLE
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[A Case of Pancreatic Head Neuroendocrine Tumor with Multiple Liver Metastases Successfully Treated with Multimodality Therapy IncludingRepeat Hepatectomy].

A 68-year-old man who had a history of bone marrow transplantation for acute myeloid leukemia was referred to our hospital due to an abnormal liver function test. Based on the clinical diagnosis of P-NET G2 with multiple livermetastases, pylorus-preserving pancreaticoduodenectomy with combined resection of the portal vein and liver sampling were performed (R2 resection). The resected specimen revealed NET-G2 tumorof the pancreatic head(Ki-67 proliferation index 5.0%)and hepatic metastasis(Ki-67 index 2.2%). Although CDDP/ETP(PE)and everolimus(AfinitorTM)regimen were started postoperatively, PE was discontinued due to bone marrow suppression. As the liver metastasis stayed SD for 4 months by everolimus single therapy, 6 hepatic metastases were resected for curative intent 5 months postoperatively. Thereafter, multiple liver metastases appeared 10 months after the metastasectomy. Everolimus single therapy was restarted. As the metastases were maintained SD for 4 months, repeat hepatectomy was performed for curative intent after right portal vein embolization. Multimodality therapy including repeat metastasectomy should be considered for selected patients with P-NET G2 with liver metastases for prolonged survival, if the operation can be performed with low perioperative morbidity.

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