Abstract Library

#3828 Role of endoscopic resection margin (R1) in the clinical outcome of patients with neuroendocrine neoplasia

Introduction: Endoscopic resection margin R1 (ER1) describes neoplasia presence at lateral and/or deep margin. Highest rate of R1 resection occurs in duodenal NENs (d-NENs) where advanced resection techniques [endoscopic submucosal dissection (ESD); full thickness resection (EFTR)], are more difficult to apply. In gastric (g-NENs) and rectal NENs (r-NENs), due to favourable anatomy, ESD or EFTR obtain lower rates of R1 resection.

Conference:

Presenting Author: Marasco M

Authors: Marasco M, Massironi S, Campana D, Mosca M, Dell'unto E,

Keywords: neuroendocrine, endoscopy,

#3667 Outcome of endoscopic submucosal dissection for rectal neuroendocrine neoplasms – A multicentre study

Introduction: Recent guidelines recommend advanced endoscopic resection techniques, such as Endoscopic Submucosal Dissection (ESD), for the treatment of rectal neuroendocrine neoplasms (R-NENs) under 15mm due to high rate of positive margins at Endoscopic Mucosal Resection (EMR).

Conference:

Presenting Author: Rimondi A

Authors: Rimondi A, Despott E, Lemmers A, Chacchi-Cahuin R, Lazaridis N,

Keywords: ESD, R-NENs, endoscopy,

#3300 Clinicopathological characteristics of 83 lymph node negative rectal neuroendocrine tumors

Introduction: Rectal neuroendocrine neoplasms (R-NENs) are rare tumors originating from enteric neuroendocrine cells. In recent decades, the incidence and prevalence of R-NENs have increased year by year. According to the US SEER data, the incidence rate of R-NENs is 1.10 per 100,000 cases, and the prevalence has risen from 1/1 100,000 cases in 193 to 14 per 100,000 in 2012.

Conference: 18th Annual ENETS Concerence (2021)

Presenting Author: Han D

Authors: Han D, Su W, Li J, Wang C, Qi Z,

Keywords: rectal neuroendocrine tumor, lymph node-negative, clinicopathological characteristics, treatment, prognosis,

#3205 Risk factors of the distant metastasis in rectal neuroendocrine neoplasms: A 10-year retrospective multi-center study in China

Introduction: The research about risk factors of distant metastasis in rectal neuroendocrine neoplasms (R-NENs) based on multi-center data is rare.

Conference: 18th Annual ENETS Concerence (2021)

Presenting Author:

Authors: Zhang J, Yang H, Jiang L, Chi Y, Fan J,

Keywords: rectum, neuroendocrine, tumor, distant metastases, risk factor,

#3148 Resection of primary tumor improves survival rate in rectal neuroendocrine neoplasms with liver metastasis

Introduction: The current ENETS and NANETS guidelines support resection of primary tumors in advanced rectal neuroendocrine neoplasms. But there is no evidence that primary tumor resection is beneficial to the prognosis of rNENs patients with liver metastasis.

Conference: 18th Annual ENETS Concerence (2021)

Presenting Author:

Authors: Long Q, Xue J, Bai J, Hu P, Liu M,

Keywords: liver metastasis, overall survival, primary tumor resection, rectal neuroendocrine neoplasm,