Abstract
The combination of neuroendocrine/non neuroendocrine lung tumors (CNNELT) mentioned in the last edition of the World Health Organization (WHO) of Thoracic Tumors refers to small cell carcinoma (SCLC) or large cell neuroendocrine carcinoma (LCNEC) mixed with any other non-small cell lung carcinoma (NSCLC). Typical Carcinoid (TC)/Atypical Carcinoid (AC) combined with NSCLC is not included among this category. However, case reports of TC/AC combined with NSCLC have been described. We previously reported 2 cases of lung adenocarcinoma (LUA) mixed with carcinoid sharing mutations in both components supporting the hypothesis of a clonal origin. We extended our analysis to other four cases of mixed NSCLC-carcinoid by performing targeted-DNA and RNA-based NGS analysis in both primary and their paired lymph nodes metastasis. In all cases, LUA and AC components shared at least 1 common mutation (KRAS driver mutation p.Gly12Val in cases 1 and 3, AKAP13-RET fusion in case 2, and missense KRAS driver mutation p.Gly12Ala in case 4, reinforcing the hypothesis of a clonal origin. Moreover, the same mutation was detected in the metastasis constituted only by AC (cases 2 and 4). Although it is a rare malignancy in the lung, mixed LUA and TC/AC could be included among the histotypes for which a deep molecular characterization of both components is needed to identify the presence of potential druggable genetic alterations.
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“Fig. 4 was re-adapted from the manuscript by Parente et al. Front Mol Biosci. 2021 Dec 3;8:784876 (Figs. 2 and 5), http://creativecommons.org/licenses/by/4.0/”. We thank Dr. Chiara Di Giorgio (Fondazione IRCC Casa Sollievo della Sofferenza; San Giovanni Rotondo) for editing this manuscript for English language.
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Conceptualization: Paola Parente (PP) and Lucia Anna Muscarella (LAM); methodology: Paolo Graziano (PG), PP, Flavia Centra (FC), Massimo Milione (MM), Giovanni Centonze (GC), Marco Volante (MV) Alberto Cavazza (AC), Diego Urbano (DU) Giuseppe Di Maggio (GDM) Teresa Balsamo (TB), Concetta Di Micco (CDM), Giulio Rossi (GR), Antonio Rossi (AR), and LAM; validation: MM, MV, AC, GR, and AR; formal analysis: PG, PP, and LAM; investigation FC, GC, DU, GDM, TB, and CDM; data curation: PP and LAM ; writing—original draft preparation: PG, PP, and LAM; writing— review and editing: MM, MV, GR, and AR; supervision: GR and PG. All Authors read and approved the final manuscript.
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Graziano, P., Parente, P., Centra, F. et al. Clinical impact of mixed pulmonary carcinoma and carcinoid: the driver from their mono-clonal origin. Virchows Arch 484, 37–46 (2024). https://doi.org/10.1007/s00428-023-03663-x
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DOI: https://doi.org/10.1007/s00428-023-03663-x