Therapy for Children With Advanced Stage Neuroblastoma

EFS was estimated as time to relapse, progressive disease, secondary neoplasm, or death from any cause from enrollment. The EFS was estimated by Kaplan-Meier method

Time frame: 3 years, from time of enrollment

Per the 1993 INRC: measurable tumor defined as product of the longest x widest perpendicular diameter, elevated catecholamine levels and tumor cels in bone marrow. Complete Response (CR)-no evidence of primary tumor or metastases. Very Good Partial Response (VGPR)-\>90% reduction of primary tumor; no metastases; no new bone lesions, all pre-existing lesions improved. Partial Response (PR)-50-90% reduction of primary tumor; \>50% reduction in measurable sites of metastases; 0-1 bone marrow samples with tumor; number of positive bone sites decreased by \>50%. Mixed Response (MR)-\>50% reduction of any measurable lesion with \<50% reduction in other sites; no new lesions; \<25% increase in any existing lesion. No Response (NR)-no new lesions; \<50% reduction but \<25% increase in an any existing lesion. No Response (NR)-no new lesions; \<50% reduction but \<25% increase in any existing legions. Progressive Disease (PD)-any new/increased measurable lesion by \>25%; previous negative marrow positive.

Time frame: After two initial courses of chemotherapy (approximately 6 weeks after enrollment)

Number of patients who experience an unacceptable dose limiting toxicity (per CTCAE v 4.0) including the following toxicities: 1) Toxicity requiring the use of pressors, including Grade 4 acute capillary leak syndrome or Grade 3 and 4 hypotension; 2) Toxicity requiring ventilation support, including Grade 4 respiratory toxicity; 3) Grade 3 or 4 neurotoxicity with MRI evidence of new CNS thrombi, infarction or bleeding.

Time frame: During MRD treatment cycle (approximately 8-12 months after enrollment)

Number of patients who experience an unacceptable dose limiting toxicity (per CTCAE v 4.0) including the following toxicities: 1) toxicity requiring the use of pressors, including Grade 4 acute capillary leak syndrome or Grade3 and 4 hypotension; 2) Toxicity requiring ventilation support, including Grade 4 respiratory toxicity; 3) Grade 3 or 4 neurotoxicity with MRI evidence of new CNS thrombi, infarction or bleeding in any subject receiving the hu14.18K322A with NK cell combination; 4) Failure of recovery of ANC \> 500/mm3 by day 35 after PBSC infusion. Number of patients who experience Grade 3 or Grade 4 (per Common Toxicity Criteria v 4.0) veno occlusive disease (VOD).

Time frame: During the recovery phase after busulfan/melphalan and PBSC rescue (approximately 24-26 weeks after enrollment)

The study is designed to monitor the feasibility of delivering hu14.18K332A to 6 cycles of Induction chemotherapy. The feasibility of Induction therapy for this study will be to target no worse than 75%. A patient was considered as a failure for the 6 cycles of Induction therapy if the patient failed to complete Induction therapy within 155 days since treatment initiation due to toxicity or disease progression, unless the delay was a result of non-medical issues (e.g. not due to protocol toxicity). The proportion of patients who successfully received hu14.18K322A with 6 cycles of induction chemotherapy was estimated together with a 95% confidence interval. The response rate (CR + VGPR + PR) to 6 cycles of Induction chemoimmunotherapy was estimated together with the 95% confidence intervals

Time frame: After 6 cycles of induction therapy (approximately 24 weeks after enrollment)

Local failure is defined as relapse or progression of disease at the primary site. The cumulative incidence of local failure will be estimated; competing events will include distant failure or death prior to local failure.

Time frame: Up to 3 years