Table 2.

Results of studies using visual method for iPET interpretation

ReferencesmFUiPETnegPPVNPVPFS according to iTEPOS according to iTEPConclusion(s) of the authors: iTEP
Jerusalem et al30  17.5 mo 82% 100% 67% 2-y PFS neg: 62% vs pos: 0% 2-y OS neg: 0% pos: 68% “is predictive of CR, PFS and OS in NHL” 
Spaepen et al 36 mo 53% (all patients) 100%* 84%* mPFS (all patients) neg: 1059 d vs pos:45 d 3-y OS (all patients) neg: >90% pos: 30% “may be used to tailor induction chemotherapy in patients with aggressive NHL” 
Haioun et al39  24 mo 56.6% 44%* 90%* 2-y PFS neg: 82% vs pos: 43% 2-y OS neg: 90% pos: 61% “should be an early guide to first-line strategies in aggressive lymphoma” 
Mikhaeel et al40  24.4 mo 41% and 15.7% with MUR 71%* 90%* 2-y PFS (all patients) neg: 93% vs pos: 30% MRU: 59.9% 2-y OS (all patients) neg: 100% pos: 73% MRU 82.4% “is an accurate and independent predictor of PFS and OS” 
Kostakoglu et al 21 mo 45% 75% 100% 2-y PFS (all patients) neg: 100% vs pos: 12.5% — has “a high prognostic value after 1 cycle of chemotherapy …and may offer the potential for change in treatment paradigms” 
Querellou et al41  — 75% 83%* 83%* mEFS neg: 233 d vs pos: 465 d — “can predict the outcome of patients with aggressive lymphoma and should be a useful tool to modify an ineffective therapy” 
Han et al 24 mo (all patients) 67.5% (all patients) 33% (all patients) 68% (all patients) 2-y PFS (all patients) neg: 83% vs pos: 77% 2-y OS (all patients) neg: 90% pos: 84% “is not predictive of survival outcomes” 
Fruchard et al42  22 mo (all patients) 57% (all patients) 70%§ 100%§ 2-y EFS neg: 85% vs pos: 30% 2-y OS neg: 84% pos: 36% “is valuable tool to early predict outcome” 
Dupuis et al43  53 mo 78% — — 5-y EFS neg: 80% pos: 36% — “offers a powerful tool to predict outcome” 
Moskowitz et al11  44 mo 61%; 33 out of 38 pts with pos iPET had a negative biopsy — — 2-y PFS§ neg: >90% pos with neg biopsy: 80%-85% pos with pos biopsy: 60% — “interim or posttreatment FDG-PET evaluation did not predict outcome; we recommend biopsy confirmation of an abnormal interim FDG-PET scan before changing therapy” 
Cashen et al15  33.9 mo 52% 42% for relapse 33% for EOT§ 77% for relapse; 100% for EOT§ 2-y EFS neg: 85% pos: 63% 2-y OS§ neg: 85% pos: 65% “has a high NPV but low PPV” 
Yang et al45  30 mo 72% — — 3-y PFS IWC: neg: 86% vs pos: 29.2% D5S: neg: 88.3% vs pos: 52.5% 3-y OS IWC: neg: 86.4% vs pos: 31.1% D5S: neg: 91.4% vs pos: 53.3% “had a significant predictive value for disease progression and survival”; “might be the single most important determinant of clinical outcome in patients with the same IPI risk” 
Micallef et al46  43 mo 78% 46%§ 88.8%§ — — “using a positive PET2 to change therapy is not supported” 
Zinzani et al47  50 mo 61.5% 62%§ 96.5%§ 4-y EFS neg: 75% vs pos: 18% 4-y OS neg: 90% vs pos: 67% “may represent a significant step forward in helping physicians make crucial decisions on further treatment” 
Yoo et al48  20 mo 64.5% 62% 93% 3-y PFS neg: 84% vs pos: 66% 3-y OS neg: 84% vs pos: 77% “might be an inappropriate tool for designing risk-adaptive therapy” 
Safar et al22  38 mo 62.5% 61%§ 75.7%* for EOT according to CT/scan 3-y PFS neg: 84% vs pos: 47% 3-y OS neg: 88% vs pos: 62% “predicts the outcome in DLBCL patients”; “still requires reproducible and universal interpretation criteria to permit reliable conclusions to be made for the routine use” 
Carr et al44  35 mo 64% 45.8%§ for EOT 100%§ for EOT 2-y EFS neg: 90% vs pos: 58% 2-y OS neg: 93% vs pos: 72% “does not differentiate chemoresistant residual tumor from CR, nor does it provide sound basis for early escalation of therapy” 
Swinnen et al49  4.6 y 79% 42%§ 75% for 2-y PFS 2-y PFS neg: 76% vs pos: 42% 2-y OS neg: 93% vs pos: 77% “Treatment modification based on early PET should remain confined to clinical trials” 
Mamot et al23  24 mo 40% at C2; 45% at C4 51.8%; 2-y EFS 71% for 2-y EFS 2-y EFS local visual: neg: 74.2% vs pos: 48.2%; Deauville central: neg: 75.9% vs pos: 41.4% 2-y OS local visual: neg: 90.6% vs pos: 87.7%; Deauville central: neg: 93.9% vs pos: 84% “has limited prognostic value”; “is not ready for clinical use to guide treatment decisions in individual patients” 
Hertzberg et al31  35 mo 71% at C4 — — 2-y PFS: neg: 74% pos: 67% 2-y OS: neg: 88% pos: 78% “this study provides support for the further investigation of early selection of poor prognosis DLBCL patients, as identified by iPET scanning” 
ReferencesmFUiPETnegPPVNPVPFS according to iTEPOS according to iTEPConclusion(s) of the authors: iTEP
Jerusalem et al30  17.5 mo 82% 100% 67% 2-y PFS neg: 62% vs pos: 0% 2-y OS neg: 0% pos: 68% “is predictive of CR, PFS and OS in NHL” 
Spaepen et al 36 mo 53% (all patients) 100%* 84%* mPFS (all patients) neg: 1059 d vs pos:45 d 3-y OS (all patients) neg: >90% pos: 30% “may be used to tailor induction chemotherapy in patients with aggressive NHL” 
Haioun et al39  24 mo 56.6% 44%* 90%* 2-y PFS neg: 82% vs pos: 43% 2-y OS neg: 90% pos: 61% “should be an early guide to first-line strategies in aggressive lymphoma” 
Mikhaeel et al40  24.4 mo 41% and 15.7% with MUR 71%* 90%* 2-y PFS (all patients) neg: 93% vs pos: 30% MRU: 59.9% 2-y OS (all patients) neg: 100% pos: 73% MRU 82.4% “is an accurate and independent predictor of PFS and OS” 
Kostakoglu et al 21 mo 45% 75% 100% 2-y PFS (all patients) neg: 100% vs pos: 12.5% — has “a high prognostic value after 1 cycle of chemotherapy …and may offer the potential for change in treatment paradigms” 
Querellou et al41  — 75% 83%* 83%* mEFS neg: 233 d vs pos: 465 d — “can predict the outcome of patients with aggressive lymphoma and should be a useful tool to modify an ineffective therapy” 
Han et al 24 mo (all patients) 67.5% (all patients) 33% (all patients) 68% (all patients) 2-y PFS (all patients) neg: 83% vs pos: 77% 2-y OS (all patients) neg: 90% pos: 84% “is not predictive of survival outcomes” 
Fruchard et al42  22 mo (all patients) 57% (all patients) 70%§ 100%§ 2-y EFS neg: 85% vs pos: 30% 2-y OS neg: 84% pos: 36% “is valuable tool to early predict outcome” 
Dupuis et al43  53 mo 78% — — 5-y EFS neg: 80% pos: 36% — “offers a powerful tool to predict outcome” 
Moskowitz et al11  44 mo 61%; 33 out of 38 pts with pos iPET had a negative biopsy — — 2-y PFS§ neg: >90% pos with neg biopsy: 80%-85% pos with pos biopsy: 60% — “interim or posttreatment FDG-PET evaluation did not predict outcome; we recommend biopsy confirmation of an abnormal interim FDG-PET scan before changing therapy” 
Cashen et al15  33.9 mo 52% 42% for relapse 33% for EOT§ 77% for relapse; 100% for EOT§ 2-y EFS neg: 85% pos: 63% 2-y OS§ neg: 85% pos: 65% “has a high NPV but low PPV” 
Yang et al45  30 mo 72% — — 3-y PFS IWC: neg: 86% vs pos: 29.2% D5S: neg: 88.3% vs pos: 52.5% 3-y OS IWC: neg: 86.4% vs pos: 31.1% D5S: neg: 91.4% vs pos: 53.3% “had a significant predictive value for disease progression and survival”; “might be the single most important determinant of clinical outcome in patients with the same IPI risk” 
Micallef et al46  43 mo 78% 46%§ 88.8%§ — — “using a positive PET2 to change therapy is not supported” 
Zinzani et al47  50 mo 61.5% 62%§ 96.5%§ 4-y EFS neg: 75% vs pos: 18% 4-y OS neg: 90% vs pos: 67% “may represent a significant step forward in helping physicians make crucial decisions on further treatment” 
Yoo et al48  20 mo 64.5% 62% 93% 3-y PFS neg: 84% vs pos: 66% 3-y OS neg: 84% vs pos: 77% “might be an inappropriate tool for designing risk-adaptive therapy” 
Safar et al22  38 mo 62.5% 61%§ 75.7%* for EOT according to CT/scan 3-y PFS neg: 84% vs pos: 47% 3-y OS neg: 88% vs pos: 62% “predicts the outcome in DLBCL patients”; “still requires reproducible and universal interpretation criteria to permit reliable conclusions to be made for the routine use” 
Carr et al44  35 mo 64% 45.8%§ for EOT 100%§ for EOT 2-y EFS neg: 90% vs pos: 58% 2-y OS neg: 93% vs pos: 72% “does not differentiate chemoresistant residual tumor from CR, nor does it provide sound basis for early escalation of therapy” 
Swinnen et al49  4.6 y 79% 42%§ 75% for 2-y PFS 2-y PFS neg: 76% vs pos: 42% 2-y OS neg: 93% vs pos: 77% “Treatment modification based on early PET should remain confined to clinical trials” 
Mamot et al23  24 mo 40% at C2; 45% at C4 51.8%; 2-y EFS 71% for 2-y EFS 2-y EFS local visual: neg: 74.2% vs pos: 48.2%; Deauville central: neg: 75.9% vs pos: 41.4% 2-y OS local visual: neg: 90.6% vs pos: 87.7%; Deauville central: neg: 93.9% vs pos: 84% “has limited prognostic value”; “is not ready for clinical use to guide treatment decisions in individual patients” 
Hertzberg et al31  35 mo 71% at C4 — — 2-y PFS: neg: 74% pos: 67% 2-y OS: neg: 88% pos: 78% “this study provides support for the further investigation of early selection of poor prognosis DLBCL patients, as identified by iPET scanning” 

—, data not available; CR, complete remission; EFS, event-free survival; IPI, International Prognostic Index; IWC, International Workshop Criteria; mFU, median follow-up; NHL, non-Hodgkin lymphoma; NPV, negative predictive value; OS, overall survival.

*

According to Han et al.

†According to Han et al and Terasawa et al.10 

‡Evaluated from publication by SLG and OC.

§

According to Terasawa et al.10 

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