ArticleJournal of gastrointestinal oncology2026
Diagnostic value of mini-probe endoscopic ultrasound in preoperative tumor nodal (TN) staging of gastric cancer and analysis of factors influencing T-staging accuracy.
Article in Journal of gastrointestinal oncology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Mini-probe endoscopic ultrasonography (mini-probe EUS) offers high-resolution imaging for precise evaluation of tumor infiltration depth in gastric cancer, yet its diagnostic accuracy and influencing factors remain unclear. This study aimed to evaluate the diagnostic performance of mini-probe EUS in the preoperative tumor nodal (TN) staging of gastric cancer and to identify factors influencing the accuracy of T staging. Methods: A retrospective analysis was conducted on 85 patients diagnosed with gastric cancer who underwent preoperative assessment using both standard gastroscopy and mini-probe EUS. Preoperative staging results were compared with postoperative pathological staging results to determine diagnostic accuracy. Results: The overall accuracy of mini-probe EUS in assessing the depth of tumor infiltration (T staging) was 88.23%, with stage-specific accuracies of 93.33% for T1, 89.29% for T2, 78.95% for T3, and 87.50% for T4. The overall sensitivity was 88.23% (T1 93.33%, T2 92.59%, T3 83.33%, and T4 70.00%), and the total specificity was 96.08% (T1 96.36%, T2 94.83%, T3 94.03%, and T4 98.68%). For N staging, the accuracy in detecting regional local lymph node metastasis was 83.53%, with sensitivity and specificity values of 76.47% and 85.29%, respectively. Statistically significant differences were observed between pathological staging and mini-probe EUS findings for lesion location, lesion diameter, tissue differentiation type, and the presence of ulcers (χ Conclusions: Findings from the univariate analysis indicated that tumor differentiation, anatomical location, and endoscopic morphology significantly influenced the accuracy of T staging using mini-probe EUS. Mini-probe EUS demonstrated high accuracy in preoperative TN staging in gastric cancer, particularly in determining the depth of tumor infiltration and regional lymph node metastasis. These findings highlight the high diagnostic accuracy of mini-probe EUS for T staging, which provides valuable information to guide clinical management decisions such as the selection between endoscopic and surgical resection.
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