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Prognostic Utility of Quantitative PET Parameters on Baseline and Interim FDG-PET Scans in Hodgkin Lymphoma
Natalia Kovaleva1, Shin Hnin Wai2, Niamh Waters2
1Department of Molecular Imaging and Therapy, Austin Health, Melbourne, Victoria, Australia.
Background:
In classical Hodgkin lymphoma (cHL), interim positron emission tomography (iPET) using Deauville Score (DS) guides therapy. Quantitative PET parameters, including changes in maximum standard uptake value [ΔSUVmax], total metabolic tumor volume [ΔTMTV], total lesion glycolysis [ΔTLG], may enhance the predictive value of iPET.
Methods:
This retrospective study analysed 98 cHL patients from 2008 to 2022, assessing quantitative PET parameters at baseline (PET0), after 2 or 3 chemotherapy cycles (iPET), and associations with survival outcomes.
Results:
Advanced-stage disease was present in 45% of patients. At PET0, no parameters were significantly associated with progression-free survival (PFS). At iPET, the only quantitative parameter independently associated with inferior PFS was ΔSUVmax <72% (HR 5.1, 95% CI 1.7-15.5, P = .004). DS positivity was also independently associated with inferior PFS (HR 2.92, 95% CI 1.07-8.01, P = 037). iPET parameters of ΔTLG <99%, and ΔTMTV <99% achieved univariate but not independent statistical significance.
Conclusion:
Larger prospective studies are needed to validate these findings and evaluate quantitative PET parameters in cHL patient risk stratification.
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