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Background <p>To develop a predictive nomogram for differentiating pancreatic cancer from periampullary non-pancreatic cancers based on computed tomography (CT) imaging features.</p> Methods <p>This retrospective study included 171 patients diagnosed with periampullary carcinoma (90 pancreatic cancer and 81 non-pancreatic cancer). Variables assessed included CT imaging features along with relevant clinical data. Statistically significant variables were identified through multivariable logistic regression analysis, and a predictive nomogram was developed and internally validated based on these factors.</p> Results <p>Multivariable analysis identified the following independent risk factors: the distance from the distal end of the dilated pancreatic duct to the medial wall of the papilla (DPDP) (odds ratio [OR] 8.76, <i>P</i> &lt; 0.05), the distance from the distal end of the dilated bile duct to the medial wall of the papilla (DBDP) (OR 31.83, <i>P</i> &lt; 0.05), papillary enlargement (OR 0.03, <i>P</i> &lt; 0.05), and visibility of pancreatic and/or bile ducts between the tumor and the papilla (VPBD) (OR 3.97, <i>P</i> &lt; 0.05). A nomogram was constructed based on these four significant features. In both the development and validation cohorts, the nomogram demonstrated robust predictive performance, with areas under the receiver operating characteristic curve (AUCs) of 0.84 (95% CI, 0.77–0.91) and 0.81 (95% CI, 0.67–0.96), respectively.</p> Conclusions <p>This study underscores the value of CT imaging features in distinguishing pancreatic cancer from periampullary non-pancreatic cancers. The identification of key imaging markers with significant diagnostic value facilitated the development and validation of a nomogram that integrates these features, providing a more reliable tool for clinical decision-making.</p>

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Differentiating pancreatic from periampullary non-pancreatic cancer: a nomogram-based prediction model utilizing CT imaging

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年9月29日

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  • Xiaohuan Zhang,
  • Junqing Wang,
  • Wenjuan Wu,
  • Zhuiyang Zhang,
  • Fangming Chen,
  • Lei Zhang

摘要

Background

To develop a predictive nomogram for differentiating pancreatic cancer from periampullary non-pancreatic cancers based on computed tomography (CT) imaging features.

Methods

This retrospective study included 171 patients diagnosed with periampullary carcinoma (90 pancreatic cancer and 81 non-pancreatic cancer). Variables assessed included CT imaging features along with relevant clinical data. Statistically significant variables were identified through multivariable logistic regression analysis, and a predictive nomogram was developed and internally validated based on these factors.

Results

Multivariable analysis identified the following independent risk factors: the distance from the distal end of the dilated pancreatic duct to the medial wall of the papilla (DPDP) (odds ratio [OR] 8.76, P < 0.05), the distance from the distal end of the dilated bile duct to the medial wall of the papilla (DBDP) (OR 31.83, P < 0.05), papillary enlargement (OR 0.03, P < 0.05), and visibility of pancreatic and/or bile ducts between the tumor and the papilla (VPBD) (OR 3.97, P < 0.05). A nomogram was constructed based on these four significant features. In both the development and validation cohorts, the nomogram demonstrated robust predictive performance, with areas under the receiver operating characteristic curve (AUCs) of 0.84 (95% CI, 0.77–0.91) and 0.81 (95% CI, 0.67–0.96), respectively.

Conclusions

This study underscores the value of CT imaging features in distinguishing pancreatic cancer from periampullary non-pancreatic cancers. The identification of key imaging markers with significant diagnostic value facilitated the development and validation of a nomogram that integrates these features, providing a more reliable tool for clinical decision-making.