臨牀消化器内科 Vol.34 No.12(2-7)


特集名 遭遇の機会が増えたIPMN/膵囊胞―現状と課題
題名 IPMN/膵囊胞の診療 (7) IPMN の外科的治療
発刊年月 2019年 11月
著者 廣野 誠子 和歌山県立医科大学第2外科
著者 山上 裕機 和歌山県立医科大学第2外科
【 要旨 】 膵intraductal papillary mucinous neoplasm(IPMN)は,invasive intraductal papillary mucinous carcinoma(IPMC)になると,リンパ節転移・膵外再発を生じえ,生存期間はlow‒grade dysplasia(LGD)/high‒grade dysplasia(HGD)と比べ不良である.IPMN患者の生存期間を延長するには,invasive IPMCになる前に切除する必要があるが,膵切除術は未だ高侵襲な手術であり,LGDであればフォローアップが好ましく,HGDでの切除がベストである.invasive IPMCは,通常型膵癌と同様のリンパ節郭清が必要であるが,noninvasive IPMNに対しては,可能な限り残膵を温存する術式を選択することで,膵内・外分泌機能が良好になる.また,残膵再発に対して残膵切除を行うことで,生存期間の延長が期待でき,術後定期的なsurveillanceにより,切除可能な状態で残膵再発を診断することが重要である.
Theme IPMN/Pancreatic Cyst as an Increasing Common Disease -- Current Status and Issues
Title Surgical Treatment for Intraductal Papillary Mucinous Neoplasm
Author Seiko Hirono Second Department of Surgery, Wakayama Medical University, School of Medicine
Author Hiroki Yamaue Second Department of Surgery, Wakayama Medical University, School of Medicine
[ Summary ] Once intraductal papillary mucinous neoplasm (IPMN) has invasive components, lymph node metastasis or postoperative extra‒pancreatic recurrence may occur, and then, the survival of invasive intraductal papillary mucinous carcinoma (IPMC) patients is worse than those with noninvasive IPMN. Therefore, we suggest that IPMN should be resected before the tumor progresses to invasive IPMC to prolong the survival for IPMN patients. Regarding operative procedures, regional lymph node dissection (as for pancreatic ductal adenocarcinoma) might be needed for invasive IPMC. Instead of total pancreatectomy, an operation with preserving pancreatic parenchyma should be considered to preserve long‒term endocrine and exocrine function if pathological the pancreatic cut margin does not have high‒grade dysplasia nor invasive IPMC. Regarding remnant pancreatic recurrence after surgical resection, remnant pancreatectomy for recurrence might prolong the survival for IPMN patients with remnant pancreatic recurrence. Long‒term surveillance might be necessary to evaluate the remnant pancreatic recurrence after surgical resection for IPMN.
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