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Metachronous liver metastases after long-term follow-up of endoscopic resection for rectal neuroendocrine neoplasms : a report of three cases

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Title: Metachronous liver metastases after long-term follow-up of endoscopic resection for rectal neuroendocrine neoplasms : a report of three cases
Authors: Hane, Yuma Browse this author
Tsuchikawa, Takahiro Browse this author →KAKEN DB
Tanaka, Kimitaka Browse this author →KAKEN DB
Nakanishi, Yoshitsugu Browse this author →KAKEN DB
Asano, Toshimichi Browse this author →KAKEN DB
Noji, Takehiro Browse this author →KAKEN DB
Kurashima, Yo Browse this author →KAKEN DB
Ebihara, Yuma Browse this author →KAKEN DB
Murakami, Soichi Browse this author →KAKEN DB
Nakamura, Toru Browse this author →KAKEN DB
Okamura, Keisuke Browse this author →KAKEN DB
Takeuchi, Satoshi Browse this author
Shichinohe, Toshiaki Browse this author →KAKEN DB
Hirano, Satoshi Browse this author →KAKEN DB
Keywords: Neuroendocrine neoplasm
Endoscopic resection
Long-term follow-up
Recurrence
Issue Date: 15-Jan-2020
Publisher: Springer (SpringerOpen)
Journal Title: Surgical case reports
Volume: 6
Issue: 1
Start Page: 22
Publisher DOI: 10.1186/s40792-020-0792-5
PMID: 31940115
Abstract: Background Rectal neuroendocrine neoplasms (NENs) are rare, but their incidence has increased in recent years. The metastasis rate is low in cases of a tumor diameter < 1 cm or depth of invasion lower than the submucosa; therefore, the European Neuroendocrine Tumor Society (ENETS) and the North American Neuroendocrine Tumor Society (NANETS) consensus guidelines recommend endoscopic resection. Since little has been reported on the long-term prognosis of endoscopic resection for rectal NEN, consensus is lacking regarding the follow-up period after endoscopic resection. Case presentation Here, we report three cases of metachronous liver metastasis after long-term follow-up of endoscopic mucosal resection (EMR) for rectal NEN. The pathological findings indicated a depth lower than the submucosa and complete radical resection in all cases and lymphovascular invasion in only one case. All three cases showed metachronous multiple liver metastases after 9-13 years of follow-up for EMR, despite achieving complete resection and without muscular invasion. Conclusions Metachronous liver metastases may occur after long interval following endoscopic resection; thus, long-term follow-up is necessary after endoscopic resection for rectal NEN.
Rights: https://creativecommons.org/licenses/by/4.0/
Type: article
URI: http://hdl.handle.net/2115/76917
Appears in Collections:北海道大学病院 (Hokkaido University Hospital) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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