Abstract
Purpose
We investigated the prognostic value of total metabolic tumour volume (TMTV) in diffuse large B-cell lymphoma (DLBCL).
Methods
TMTV was measured in 114 patients with newly diagnosed DLBCL who underwent 18F-FDG PET/CT at baseline before immunochemotherapy. TMTV was computed by summing the volumes of all lymphomatous lesions after applying the local SUVmax threshold of 41 % using semiautomatic software. Prognostic value was assessed by Kaplan-Meier estimates of progression-free survival (PFS) and overall survival (OS).
Results
Median follow-up was 39 months. Average pretherapy TMTV was 509 ± 568 cm3. The 3-year estimates of PFS were 77 % in the low metabolic burden group (TMTV ≤550 cm3) and 60 % in the high metabolic burden group (TMTV >550 cm3, p = 0.04), and prediction of OS was even better (87 % vs. 60 %, p = 0.0003). Cox regression showed independence of TMTV for OS prediction (p = 0.002) compared with other pretherapy indices of tumour burden, such as tumour bulk and the International Prognostic Index.
Conclusion
Pretherapy TMTV is an independent predictor of outcome in patients with DLBCL.
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Sasanelli, M., Meignan, M., Haioun, C. et al. Pretherapy metabolic tumour volume is an independent predictor of outcome in patients with diffuse large B-cell lymphoma. Eur J Nucl Med Mol Imaging 41, 2017–2022 (2014). https://doi.org/10.1007/s00259-014-2822-7
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DOI: https://doi.org/10.1007/s00259-014-2822-7