RT Journal Article SR Electronic T1 Resin Versus Glass Microspheres for 90Y Transarterial Radioembolization: Comparing Survival in Unresectable Hepatocellular Carcinoma Using Pretreatment Partition Model Dosimetry JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1334 OP 1340 DO 10.2967/jnumed.116.184713 VO 58 IS 8 A1 Axel Van Der Gucht A1 Mario Jreige A1 Alban Denys A1 Paul Blanc-Durand A1 Ariane Boubaker A1 Anastasia Pomoni A1 Periklis Mitsakis A1 Marina Silva-Monteiro A1 Silvano Gnesin A1 Marie Nicod Lalonde A1 Rafael Duran A1 John O. Prior A1 Niklaus Schaefer YR 2017 UL http://jnm.snmjournals.org/content/58/8/1334.abstract AB The aim of this study was to compare survival of patients treated for unresectable hepatocellular carcinoma (uHCC) with 90Y transarterial radioembolization (TARE) using pretreatment partition model dosimetry (PMD). Methods: We performed a retrospective analysis of prospectively collected data on 77 patients consecutively treated (mean age ± SD, 66.4 ± 12.2 y) for uHCC (36 uninodular, 5 multinodular, 36 diffuse) with 90Y TARE (41 resin, 36 glass) using pretreatment PMD. Study endpoints were progression-free survival (PFS) and overall survival (OS) assessed by Kaplan–Meier estimates. Several variables including Barcelona Clinic Liver Cancer (BCLC) staging system, tumor size, and serum α-fetoprotein (AFP) level were investigated using Cox proportional hazards regression. Results: The characteristics of 2 groups were comparable with regard to demographic data, comorbidities, Child–Pugh score, BCLC, serum AFP level, and 90Y global administered activity. The median follow-up time was 7.7 mo (range, 0.4–50.1 mo). Relapse occurred in 44 patients (57%) at a median of 6 mo (range, 0.4–27.9 mo) after 90Y TARE, and 41 patients (53%) died from tumor progression. Comparison between resin and glass microspheres revealed higher but not statistically significantly PFS and OS rates in the 90Y resin group than the 90Y glass group (resin PFS 6.1 mo [95% confidence interval CI, 4.7–7.4] and glass PFS 5 mo [95% CI, 0.9–9.2], P = 0.53; resin OS 7.7 mo [95% CI, 7.2–8.2] and glass OS 7 mo [95% CI 1.6–12.4], P = 0.77). No significant survival difference between both types of 90Y microspheres was observed in any subgroups of patients with early/intermediate or advanced BCLC stages. Among the variables investigated, Cox analyses showed that only in the glass group, the BCLC staging system and the serum AFP level were associated with PFS (P = 0.04) and OS (P = 0.04). Tumor size was a prognostic factor without significant influence on PFS and OS after 90Y TARE. Conclusion: Comparison between resin and glass microspheres revealed no significant survival difference in patients treated for uHCC with 90Y TARE using pretreatment PMD. Further, larger prospective studies are warranted to confirm these findings.