Abstract
Objectives: MYC gene rearrangements in diffuse large B cell lymphomas (DLBCLs) result in high proliferation rates and are associated with a poor prognosis. Strong proliferation is associated with high metabolic demand and tumour necrosis. The aim of this study was to investigate differences in the presence of necrosis and semiquantitative 18 F-FDG PET metrics between DLBCL cases with or without a MYC rearrangement. The prognostic impact of necrosis and semiquantitative 18 F-FDG PET parameters was investigated in an explorative survival analysis. Methods: Fluorescence in situ hybridisation analysis for MYC rearrangements, visual assesment, semiquantitative analysis of 18 F-FDG PET scans and patient survival analysis were performed in 61 DLBCL patients, treated at a single referral hospital between 2008 and 2015. Results: Of 61 tumours, 21 (34%) had a MYC rearrangement (MYC + ). MYC status was neither associated with the presence of necrosis on 18 F-FDG PET scans (necrosis PET ; p = 1.0) nor associated with the investigated semiquantitative parameters maximum standard uptake value (SUV max ; p = 0.43), single highest SUV max (p = 0.49), metabolic active tumour volume (MATV; p = 0.68) or total lesion glycolysis (TLG; p = 0.62). A multivariate patient survival analysis of the entire cohort showed necrosis PET as an independent prognostic marker for disease-specific survival (DSS) (HR = 13.9; 95% CI 3.0–65; p = 0.001). Conclusions: MYC rearrangements in DLBCL have no influence on the visual parameter necrosis PET or the semi-quantiative parameters SUV max , MATV and TLG. Irrespective of MYC rearrangements, necrosis PET is an independent, adverse prognostic factor for DSS. Key Points: • Retrospective analysis indicates that MYC rearrangement is not associated with necrosis on 18 F-FDG PET (necrosis PET ) scans or semiquantitative 18 F-FDG PET parameters. • Necrosis PET is a potential independent adverse prognostic factor for disease-specific survival in patients with DLBCL and is not influenced by the presence of MYC rearrangements.
Original language | English |
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Pages (from-to) | 6018-6028 |
Number of pages | 11 |
Journal | European Radiology |
Volume | 29 |
Issue number | 11 |
DOIs | |
Publication status | Published - 1 Nov 2019 |
Externally published | Yes |
Keywords
- Diffuse, large B cell, lymphoma
- Fluorodeoxyglucose F18
- MYC oncogene
- Necrosis
- Positron emission tomography