18 F-FDG PET Dissemination Features in Diffuse Large B-Cell Lymphoma Are Predictive of Outcome

J Nucl Med. 2020 Jan;61(1):40-45. doi: 10.2967/jnumed.119.229450. Epub 2019 Jun 14.

Abstract

We assessed the predictive value of new radiomic features characterizing lesion dissemination in baseline 18F-FDG PET and tested whether combining them with baseline metabolic tumor volume (MTV) could improve prediction of progression-free survival (PFS) and overall survival (OS) in diffuse large B-cell lymphoma (DLBCL) patients. Methods: From the LNH073B trial (NCT00498043), patients with advanced-stage DLCBL and 18F-FDG PET/CT images available for review were selected. MTV and several radiomic features, including the distance between the 2 lesions that were farthest apart (Dmaxpatient), were calculated. Receiver-operating-characteristic analysis was used to determine the optimal cutoff for quantitative variables, and Kaplan-Meier survival analyses were performed. Results: With a median age of 46 y, 95 patients were enrolled, half of them treated with R-CHOP biweekly (rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone) and the other half with R-ACVBP (rituximab, doxorubicin, cyclophosphamide, vindesine, bleomycin, and prednisone), with no significant impact on outcome. Median MTV and Dmaxpatient were 375 cm3 and 45 cm, respectively. The median follow-up was 44 mo. High MTV and Dmaxpatient were adverse factors for PFS (P = 0.027 and P = 0.0003, respectively) and for OS (P = 0.0007 and P = 0.0095, respectively). In multivariate analysis, only Dmaxpatient was significantly associated with PFS (P = 0.0014) whereas both factors remained significant for OS (P = 0.037 and P = 0.0029, respectively). Combining MTV (>384 cm3) and Dmaxpatient (>58 cm) yielded 3 risk groups for PFS (P = 0.0003) and OS (P = 0.0011): high with 2 adverse factors (4-y PFS and OS of 50% and 53%, respectively, n = 18), low with no adverse factor (94% and 97%, n = 36), and an intermediate category with 1 adverse factor (73% and 88%, n = 41). Conclusion: Combining MTV with a parameter reflecting the tumor burden dissemination further improves DLBCL patient risk stratification at staging.

Keywords: 18F-FDG PET/CT; DLBCL; dissemination; lymphoma; metabolic tumor volume; oncology.

MeSH terms

  • Adolescent
  • Adult
  • Antineoplastic Combined Chemotherapy Protocols / therapeutic use
  • Bleomycin / therapeutic use
  • Cyclophosphamide / therapeutic use
  • Disease-Free Survival
  • Doxorubicin / therapeutic use
  • Female
  • Fluorodeoxyglucose F18
  • Humans
  • Kaplan-Meier Estimate
  • Lymphoma, Large B-Cell, Diffuse / diagnostic imaging*
  • Male
  • Middle Aged
  • Multivariate Analysis
  • Neoplasm Metastasis
  • Neoplasm Staging
  • Positron-Emission Tomography*
  • Prednisone / therapeutic use
  • ROC Curve
  • Risk Assessment
  • Rituximab / therapeutic use
  • Treatment Outcome
  • Vincristine / therapeutic use
  • Vindesine / therapeutic use
  • Young Adult

Substances

  • R-CHOP protocol
  • Fluorodeoxyglucose F18
  • Bleomycin
  • Rituximab
  • Vincristine
  • Doxorubicin
  • Cyclophosphamide
  • Vindesine
  • Prednisone

Supplementary concepts

  • LNH 87 protocol