Using a Nomogram to Preoperatively Predict Distant Metastasis of Pancreatic Neuroendocrine Tumor in Elderly Patients

Li Gang; Bing Yuntao; Tian Maolin; Yuan Chunhui; Xiu Dianrong

doi:10.24920/003722

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Using a Nomogram to Preoperatively Predict Distant Metastasis of Pancreatic Neuroendocrine Tumor in Elderly Patients

Chinese Medical Sciences Journal Vol. 36, Issue 3, Pages: 218-224(2021)

ORIGINAL ARTICLE | Updated：2024-04-10

- Using a Nomogram to Preoperatively Predict Distant Metastasis of Pancreatic Neuroendocrine Tumor in Elderly Patients
- Affiliations：
  
  Department of General Surgery, Peking University Third Hospital, Beijing 100191, China
- Author bio：
  
  Dianrong Xiu, xiudianrong1964@163.com
- Funds：
- DOI：10.24920/003722
  CLC：
- Received：20 February 2020，
  
  Accepted：2020-5-10，
  
  Published：30 August 2021
- Accepted：
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Li Gang, Bing Yuntao, Tian Maolin, et al. Using a Nomogram to Preoperatively Predict Distant Metastasis of Pancreatic Neuroendocrine Tumor in Elderly Patients[J]. Chinese medical sciences journal, 2021, 36(3): 218-224.
DOI：

Li Gang, Bing Yuntao, Tian Maolin, et al. Using a Nomogram to Preoperatively Predict Distant Metastasis of Pancreatic Neuroendocrine Tumor in Elderly Patients[J]. Chinese medical sciences journal, 2021, 36(3): 218-224. DOI： 10.24920/003722.

摘要

目的

建立一个列线图来预测老年患者胰腺神经内分泌肿瘤（pancreatic neuroendocrine tumors

pNETs）远处转移的风险。

方法

从美国“肿瘤监测、流行病学和预后（Surveillance

Epidemiology

and End Results

SEER）数据库”中提取1973年至2015年之间年龄≥65岁pNETs患者的数据。所有符合条件的患者随机分为训练队列和验证队列。对训练队列进行单因素和多因素Logistic回归分析以确定远处转移的独立风险因素。使用R软件的rms软件包基于独立风险因素开发列线图。使用C指数和校准曲线在训练队列进行内部验证

在验证队列进行外部验证。

结果

研究共确定了411名老年pNETs患者

260名被分配到训练队列

151名被分配到验证队列。单因素和多因素Logistic回归分析表明

肿瘤部位（胰腺体/尾：比值比[

]=2.282;95%可信区间[

]：1.174-4.436

0.05）

组织学分级（低分化/未分化：

=2.600

95%

：1.266-5.339

0.05）

T分期（T2：

=8.913

95%

：1.985-40.010

0.05;T3：

=11.830

95%

：2.530-55.350

0.05;T4：

=68.650

95%

：8.020-587.600

0.05）和N分期（N1：

=3.480

95%

：1.807-6.703

0.05）被确定为老年人pNETs远处转移的独立危险因素。列线图显示出良好的预测准确性

内部验证的C指数为0.809（95%

：0.757-0.861）

外部验证的C指数为0.795（95%

：0.723-0.867）

预测的远处转移率与校准曲线的观察值吻合良好。

结论

我们建立的列线图在评估老年pNETs患者远处转移风险方面具有较好的辨别能力和准确性

可为老年pNETs患者的个体化评估和治疗决策提供参考。

Abstract

Objective

To establish a nomogram for predicting the distant metastasis risk of pancreatic neuroendocrine tumors (pNETs) in elderly patients.

Methods

We extracted data of patients with diagnosis of pNETs at age ≥65 years old between 1973 and 2015 from the Surveillance

Epidemiology

and End Results (SEER) database. All eligible patients were divided randomly into a training cohort and validation cohort. Uni- and multivariate logistic regression analyses were performed on the training cohort to identify independent factors for distant metastasis. A nomogram was developed based on the independent risk factors using rms packages of R software

and was validated internally by the training cohort and externally by the validation cohort using C-index and calibration curves.

Results

A total of 411 elderly patients were identified

of which 260 were assigned to training cohort and 151 to validation cohort. Univariate and multivariate logistic regression analyses indicated the tumor site (body/tail of pancreas: odds ratio [

]=2.282; 95% confidence interval [

]: 1.174 - 4.436

0.05)

histological grade (poorly differentiated/undifferentiated:

=2.600

95%

CI:

1.266-5.339

0.05)

T stage (T2:

=8.913

95%

: 1.985-40.010

0.05; T3:

=11.830

95%

CI:

2.530-55.350

0.05; T4:

=68.650

95%

: 8.020-587.600

0.05)

and N stage (N1:

=3.480

95%

: 1.807-6.703

0.05) were identified as independent risk factors for distant metastasis of pNETs in elderly. The nomogram exhibited good predicting accuracy

with a C-index of 0.809 (95%

CI:

0.757 - 0.861) in internal validation and 0.795 (95%

: 0.723 - 0.867) in external validation

respectively. The predicted distant metastasis rates were in satisfactory agreement with the observed values by the calibration curves.

Conclusion

The nomogram we established showed high discriminative ability and accuracy in evaluation of distant metastasis risk in elderly pNETs patients

and could provide a reference for individualized tumor evaluation and treatment decision in elderly pNETs patients.

关键词

Keywords

references

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