A Panel of CA19-9, Ca125, and Ca15-3 as the Enhanced Test for the Differential Diagnosis of the Pancreatic Lesion

Abstract EN

Background.

Proper diagnosis of pancreatic lesion etiology is a challenging clinical dilemma.

Studies suggest that surgery for suspected pancreatic ductal adenocarcinoma (PDAC) reveals a benign lesion in 5% to 13% of cases.

The aim of our study was to assess whether routinely used biomarkers such as CA19-9, Ca125, Ca15-3, and CEA, when combined, can potentially yield an accurate test predicting pancreatic lesion etiology.

Methods.

We retrospectively analyzed data of 326 patients who underwent a diagnostic process due to pancreatic lesions of unknown etiology.

Results.

We found statistically significant differences in mean levels of all biomarkers.

In logistic regression model, we applied levels CA19-9, Ca125, and Ca15-3 as variables.

Two validation methods were used, namely, random data split into training and validation groups and bootstrapping.

Afterward, we built ROC curve using the model that we had created, reaching AUC = 0,801.

With an optimal cut-off point, it achieved specificity of 81,2% and sensitivity of 63,10%.

Our proposed model has superior diagnostic accuracy to both CA19-9 (p = 0,0194) and CA125 (p = 0,0026).

Conclusion.

We propose a test that is superior to CA19-9 in a differential diagnosis of pancreatic lesion etiology.

Although our test fails to reach exceptionally high accuracy, its feasibility and cost-effectiveness make it clinically useful.