Bräutigam, Konstantin; Rodríguez-Calero, Antonio; Kim-Fuchs, Corina; Kollár, Attila; Trepp, Roman; Marinoni, Ilaria; Perren, Aurel (2021). Update on Histological Reporting Changes in Neuroendocrine Neoplasms. Current Oncology Reports, 23(6), p. 65. Springer 10.1007/s11912-021-01062-6
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PURPOSE OF REVIEW
Classification and nomenclature of neuroendocrine neoplasms (NEN) have frequently changed over the last years. These changes reflect both increasing knowledge and international standardisation.
RECENT FINDINGS
The most recent changes in the Gastro-Entero-Pancreatic system induced the concept of well-differentiated NET with high proliferation rate (NET G3), explaining partially the heterogeneity of G3 NEN. Even if the nomenclature in pulmonary NEN is still different, the terms 'carcinoid' and 'atypical carcinoid' are widely overlapping with NET G1 and NET G2. Molecular data shows an additional heterogeneity both in well-differentiated NET and poorly differentiated NEC. However, no studies are available demonstrating clinical usefulness yet. The heterogeneity of NEN regarding the organ of origin, differentiation and molecular subtypes make development of personalised therapy a challenge needing more international and interdisciplinary collaborations and clinical trials allowing stratification according to biological subgroups.
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