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Envafolimab Combined With Neoadjuvant Chemotherapy Treat Stage IIb Resectable Osteosarcoma Patients

NCT07142863 · Status: NOT_YET_RECRUITING · Phase: PHASE2 · Type: INTERVENTIONAL · Enrollment: 23

Last updated 2025-08-27

No results posted yet for this study

Summary

Given that osteosarcoma typically presents at an early age and predominantly affects pediatric and adolescent populations, early control of disease progression and the opportunity for complete tumor resection are particularly crucial. Postoperatively, patients can regain functional mobility through prosthetic implantation and artificial joint reconstruction, thereby preventing premature loss of mobility in young patients. This study aims to explore the efficacy and safety of neoadjuvant treatment with the PD-L1 antibody envafolimab in combination with standard chemotherapy in patients with resectable stage IIb osteosarcoma, and to assess whether this combined regimen can increase the proportion of patients achieving complete tumor resection.

Conditions

  • Osteosarcoma
  • Neoadjuvant Therapy
  • Neoadjuvant Chemotherapy
  • PD-L1 Antibody
  • Envafolimab

Interventions

DRUG

Envafolimab and neoadjuvant chemotherapy

\* PD-L1 inhibitor envafolimab Paediatric (\<18 years): 2.5 mg/kg (maximum 200 mg) by subcutaneous injection on Day 1 of every week (q1w). Adult (≥18 years): 200 mg flat dose by subcutaneous injection on Day 1 of every week (q1w). * Neoadjuvant chemotherapy--MAP regimen (paediatric patients) Doxorubicin 75 mg/m² intravenously on Days 1-2, administered in weeks 1 and 6 of each 6-week cycle. Cisplatin 120 mg/m² intravenously on Days 1-3, administered in weeks 1 and 6 of each 6-week cycle. Methotrexate 8-12 g/m² intravenously on Day 1 of weeks 3 and 4 of each 6-week cycle. * Neoadjuvant chemotherapy--DIA regimen (adult patients) Doxorubicin 75 mg/m² intravenously on Days 1-2, administered in weeks 1 and 6 of each 6-week cycle. Cisplatin 120 mg/m² intravenously on Days 1-3, administered in weeks 1 and 6 of each 6-week cycle. Ifosfamide 12-15 g/m² total dose intravenously on Days 1-5 of week 3 of each 6-week cycle.

Sponsors & Collaborators

  • Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine

    lead OTHER

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
12 Years
Max Age
70 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2025-08-25
Primary Completion
2026-08-31
Completion
2026-09-30

Countries

  • China

Study Locations

More Related Trials

Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07142863 on ClinicalTrials.gov