10554 Background: BEV has an established safety profile in adults, but long-term data in children are limited. This analysis examined the effects of BEV on growth/development in pediatric/adolescent pts. Methods: Data (height, weight, body mass index [BMI], bone age data) were pooled (5 trials): NCT00643565 (Ph2/soft tissue sarcoma); NCT01390948 (Ph2/high-grade glioma); NCT00085111 (Ph1/refractory solid tumors); NCT00667342 (Ph2/osteosarcoma); NCT00381797 (Ph2/glioma, medulloblastoma, ependymoma). Pts (<18 yrs old) received ≥1 dose of BEV + chemotherapy (CT) (n=268) or CT alone (n=135). Analyses were exploratory/descriptive. Reference growth data: WHO (<2 yrs); Centres for Disease Control (≥2 yrs). Results: Across the trials, mean number of BEV administrations per pt ranged 5.6–19.9 (dose 5–15mg/kg every 2/3 weeks). Median follow-up time, months (range): BEV+CT, 37.9 (2.4–64.2); CT, 22.9 (2.8–69.2). At baseline, median height, weight, and BMI were close to that of the reference population (mean standard deviation scores [SDS] close to 0). Over 60 months, a slight decline was observed in the mean SDS for height and weight in both arms in this cohort with different tumors/treatments (Table), but remained within normal range of healthy children. Trends were similar for BMI. No delay in growth velocity or bone age in BEV-treated pts vs CT only was observed up to 3 yrs, regardless of age/gender. A subgroup analysis of pts in the growth hormone-dependent development phase was consistent with the overall results. Conclusions: In this analysis, BEV inclusion in the treatment regimen did not have a negative impact on pediatric growth/development beyond that of CT alone. [Table: see text]