Accuracy of pathologic diagnosis for thymic epithelial tumors: a brief report from an Italian reference Center.

Lung Cancer : Journal of the International Association for the Study of Lung Cancer
Giulia GalliAlessandra Fabbri

Abstract

Objectives - Rare tumors are diagnostic challenges for pathologists. Consultation or referral to Centers with expertise is crucial for the right diagnosis. This is particularly true for Thymic Epithelial Tumors (TETs), whose treatment strategies vary according to histological subgroup. We aimed at evaluating the accuracy of TET pathologic characterization in an Italian reference Center. Materials and methods - All the cases with diagnosis or suspicion of TETs, which underwent a pathological second opinion at Istituto Nazionale dei Tumori (INT), Milan, between 2015 and 2019 were retrospectively reviewed. All cases had been pathologically characterized through immunohistochemistry (IHC). Descriptive statistics were used for qualitative variables. Concordance was estimated through Cohen's kappa (k). Results - Out of 278 cases of TETs diagnosed in INT, 72 were referred to INT for a pathologic revision. The INT revision changed the diagnosis in 41 cases (56.9%), with a potential therapeutic shift in 32 (44.4%). In particular, 20 cases of thymoma were reviewed as a different subtype of thymoma (19/20) or lymphoma (1/20); nine cases of thymic carcinoma were reviewed as thymoma. On the other hand, three cases of lung carcinoma were rev...Continue Reading

Citations

Jun 3, 2021·American Journal of Clinical Pathology·Neda Zarrin-Khameh

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