Abstract
This study systematically reviewed and meta-analysed the prognostic value of complete remission status at end-of-treatment (18) F-fluoro-2-deoxy-d-glucose positron emission tomography (FDG-PET) in diffuse large B-cell lymphoma (DLBCL) patients treated with rituximab, cyclophosphamide, doxorubicin, vincristine and prednisone (R-CHOP). The systematic PubMed/MEDLINE search yielded seven suitable studies comprising a total of 737 R-CHOP-treated DLBCL patients who were in complete remission at end-of-treatment FDG-PET. Overall, the methodological quality of included studies was reasonable. The disease relapse rate among all patients with complete remission status according to end-of-treatment FDG-PET ranged from 7·0% to 20·0%, with a weighted summary proportion of 13·7%. Five of seven studies reported progression-free survival (PFS) of these patients at various specific time points, i.e., 2-year PFS (n=1), estimated 3-year PFS (n=3) and 5-year PFS (n=1), which was 83%, 85-86·4% and 75%, respectively. Three of seven studies reported overall survival (OS) of these patients at various specific time points, i.e., estimated 3-year OS (n=2) and estimated 5-year OS (n=1), which were 90%, 93·6% and 83%, respectively. In conclusion, a non-negligible proportion of R-CHOP-treated DLBCL patients who achieve complete remission according to end-of-treatment FDG-PET experiences disease relapse during follow-up.
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