About 30% of hereditary Medullary Thyroid Carcinoma (MTC) have been demonstrated to harbour imbalance between mutant and wild-type RET alleles. We studied the RET copy number alterations (RET CNA) in 65 MTC and their correlation with RET mutation and patients' outcome. Fluorescence in situ Hybridization and Real-time PCR revealed RET CNA in 27.7% MTC but only in a variable percentage of cells. In sporadic MTC, RET CNA were represented by chromosome 10 aneuploidy while in hereditary MTC by RET amplification. A significant higher prevalence of RET CNA was observed in RET mutated MTC (P=0.003). RET CNA was also associated to a poorer outcome (P=0.005). However, the multivariate analysis revealed that only RET mutation and advanced clinical stage correlated with the worst outcome. In conclusion, 30% MTC harbour RET CNA in variable percentage of cells suggesting cell heterogeneity. RET CNA can be considered a poor prognostic factor potentiating the poor prognostic role of RET mutation.
|Autori:||Ciampi R; Romei C; Cosci B; Vivaldi A; Bottici V; Renzini G; Ugolini C; Tacito A; Basolo F; Pinchera A; Elisei R|
|Titolo:||Chromosome 10 and RET gene copy number alterations in hereditary and sporadic Medullary Thyroid Carcinoma.|
|Anno del prodotto:||2011|
|Appare nelle tipologie:||1.1 Articolo in rivista|