Evaluating Ex Vivo Fluorescence Confocal Microscopy for Intraoperative Diagnosis in Pediatric Surgery: A Feasibility Study

Ex vivo fluorescence confocal microscopy (FCM) is an emerging technology that enables real-time, high-resolution digital imaging of freshly excised tissues without requiring standard histological preparation. This study aims to evaluate the diagnostic performance of FCM compared with conventional histology in a pediatric population with suspected oncological pathology.A total of 18 tissue samples from pediatric patients with suspected oncological lesions were analyzed using FCM. The results were compared with the definitive diagnoses obtained via conventional histology, serving as the gold standard. Sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) were calculated to assess the diagnostic accuracy. Cohen's kappa coefficient (Κ), 95% confidence interval (95% CI), and p-value were computed to evaluate the interobserver agreement and the concordance between FCM and histology.FCM correctly identified 10 positive cases (true positives) and 7 negative cases (true negatives), with 1 false positive and no false negatives. Interobserver agreement was perfect, with a Cohen's kappa coefficient of 1.00 (95% CI: 0.81–1.00, p