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. 2010 Jul;95(7):1198-206.
doi: 10.3324/haematol.2009.016105. Epub 2010 Apr 21.

A functional dynamic scoring model to elucidate the significance of post-induction interim fluorine-18-fluorodeoxyglucose positron emission tomography findings in patients with Hodgkin's lymphoma

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A functional dynamic scoring model to elucidate the significance of post-induction interim fluorine-18-fluorodeoxyglucose positron emission tomography findings in patients with Hodgkin's lymphoma

Eldad J Dann et al. Haematologica. 2010 Jul.

Abstract

Background: The findings of interim fluorine-18-fluorodeoxyglucose positron emission tomography (FDG-PET/CT) predict progression-free survival of patients with Hodgkin's lymphoma. Historically, the assessment was based on a static all-or-none scoring system. However, the clinical significance of any positivity in interim FDG-PET/CT has not been defined.

Design and methods: Ninety-six patients with Hodgkin's lymphoma who underwent interim FDG-PET/CT were evaluated using dynamic and visual scores, employing mediastinal or liver blood pool uptake as a comparator. FDG-PET/CT was prospectively defined as positive if any abnormal F(18)FDG uptake was present. In a retrospective analysis dynamic score 0 indicated resolution of all disease sites; score 1 defined a single residual focus; score 2 denoted a reduction in the number of foci; score 3 defined a reduction in intensity with no reduction in number; and score 4 indicated no change in the number and intensity of foci or appearance of new foci.

Results: The dynamic visual score review reduced the number of positive interim studies from 24 to 6 if a score of 2 or less was considered negative, with significantly better specificity (96%) as compared to static visual scores (78%-86%). The 5-year progression-free survival and overall survival rates in patients who had a negative dynamic score were 92% and 97%, respectively; the corresponding figures for patients with positive results were 50% and 67%.

Conclusions: A dynamic visual score may be a better indicator for tailoring therapy than static visual scoring.

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Figures

Figure 1.
Figure 1.
(A) Clinical outcome according to initial therapy protocol and interim FDG-PET/CT results using the binary visual score (B). Clinical outcome according to initial therapy protocol and interim FDG-PET/CT results using the dynamic visual score.
Figure 2.
Figure 2.
Five-year progression-free survival (A) and overall survival (B) of patients with positive (n=24) and negative (n=72) interim FDG PET/CT using the binary visual score.
Figure 3.
Figure 3.
Five-year progression-free survival (A) and overall survival (B) of patients with positive (n=6) and negative (n=90) interim FDG PET/CT using the dynamic visual score.
Figure 4.
Figure 4.
Five-year progression-free survival of patients with positive and negative interim FDG PET/CT using the mediastinal blood pool uptake (A) and liver blood pool uptake (B) as comparators.

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