1. Prognostic Role of Minimal Disseminated Disease and NOTCH1/FBXW7 Mutational Status in Children with Lymphoblastic Lymphoma: The AIEOP Experience
- Author
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Federica Lovisa, Ilaria Gallingani, Elena Varotto, Cristiano Pasin, Elisa Carraro, Barbara Michielotto, Anna Garbin, Carlotta Caterina Damanti, Marco Pizzi, Emanuele S. G. d’Amore, Matilde Piglione, Paola Muggeo, Salvatore Buffardi, Luciana Vinti, Veronica Maria Folsi, Daniela Onofrillo, Alessandra Biffi, Barbara Buldini, Marta Pillon, and Lara Mussolin
- Subjects
lymphoblastic lymphoma ,minimal disseminated disease ,NOTCH1/FBXW7 ,child ,Medicine (General) ,R5-920 - Abstract
NOTCH1/FBXW7 (N/F) mutational status at diagnosis is employed for T-cell lymphoblastic lymphoma (T-LBL) patients’ stratification in the international protocol LBL 2018. Our aim was to validate the prognostic role of Minimal Disseminated Disease (MDD) alone and in combination with N/F mutational status in a large retrospective series of LBL pediatric patients. MDD was analyzed in 132 bone marrow and/or peripheral blood samples by flow cytometry. Mutations in N/F genes were analyzed on 58 T-LBL tumor biopsies. Using the previously established cut-off of 3%, the four-year progression-free survival (PFS) was 57% for stage I–III patients with MDD ≥ 3% versus 80% for patients with MDD inferior to cut-off (p = 0.068). We found a significant worsening in the four-year PFS for nonmutated (51 ± 12%) compared to mutated patients (100%, p = 0.0013). Combining MDD and N/F mutational status in a subgroup of available cases, we found a statistically significant difference in the four-year PFS for different risk groups (p = 0.0012). Overall, our results demonstrate that N/F mutational status has a more relevant prognostic value than MDD at diagnosis. However, the combination of N/F mutations with MDD analysis could identify patients with very aggressive disease, which might benefit from a more intensive treatment.
- Published
- 2021
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