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JCOG2502: A phase III trial comparing osimertinib and durvalumab following chemoradiotherapy for patients with unresectable locally advanced non-small cell lung cancer harboring EGFR mutations

JCOG2502: A randomized phase III trial comparing osimertinib and durvalumab following concurrent chemoradiotherapy for patients with unresectable locally advanced non-small cell lung cancer harboring EGFR mutations - ODYSSEIA

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT1031250864
Enrollment
160
Registered
2026-04-01
Start date
2026-04-23
Completion date
Unknown
Last updated
2026-09-14

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Non-small cell lung cancer

Interventions

Arm A: Osimertinib maintenance therapy * Osimertinib is administered orally at a dose of 80 mg once daily on a continuous basis. Treatment is continued until disease progression. Arm B: Durvalumab con

Sponsors

KENMOTSU Hirotsugu
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: (1) Histologically or cytologically proven non-small cell lung cancer (NSCLC). (2) Presence of activating EGFR mutations, defined as an exon 19 deletion or an exon 21 L858R point mutation. (3) Not judged as progressive disease (PD) according to the RECIST criteria, based on comparison between pre-chemoradiotherapy (CRT) contrast-enhanced chest and abdominal CT and post-CRT imaging. In addition, no evidence of brain metastases on post-CRT contrast-enhanced brain MRI or CT. (4) Unresectable locally advanced NSCLC, treated with definitive concurrent CRT, that met all of the following criteria (a)-(c). Patients with postoperative recurrence are not eligible. (a) Diagnosed as clinical stage IIB with N2a disease or clinical stage III before concurrent CRT (UICC-TNM 9th edition). (b) Concurrent CRT must meet all of the following criteria (i)-(iii). (i) Chemotherapy, satisfying one of the following: *At least one cycle of platinum-based chemotherapy regimen with a planned course length of 3 or 4 weeks. *At least three cycles of platinum-based chemotherapy regimen with a planned course length of 1 week. *Low-dose carboplatin administered >=10 times. (ii) RT: a total dose of 60 Gy +-10% (range, 54-66 Gy) with lung V20 = 1,000 /mm3 (ii) Hemoglobin >= 8.0 g/dL (iii) Platelet count >= 75,000 /mm3 (iv) T-bil = 92% (14) Written informed consent.

Exclusion criteria

Exclusion criteria: (1) Simultaneous or metachronous (within five years) double cancers, with the exception of intramucosal tumor curable with local therapy. (2) Active infection requiring systemic therapy. (3) Fever over 38 degrees Celsius. (4) Female during pregnancy, within 28 days of post parturition, or during lactation. (5) Psychological disorder difficult to participate in this clinical study. (6) Receiving continuous systemic corticosteroid or immunosuppressant treatment. (7) Uncontrolled diabetes mellitus. (8) History of unstable angina pectoris within three weeks or myocardial infarction within 6 months before the enrollment. (9) Uncontrolled heart valve disease, dilated cardiomyopathy, or hypertrophic cardiomyopathy. (10) Positive for HIV antibody. (11) Interstitial pneumonia and/or pulmonary fibrosis diagnosed on chest CT before initiation of concurrent CRT.

Design outcomes

Primary

MeasureTime frame
Overall survival

Secondary

MeasureTime frame
Restricted mean survival time for overall survival, progression-free survival, intracranial progression-free survival, frequency of adverse events, frequency of serious adverse events

Contacts

Public ContactHirotsugu KENMOTSU

Shizuoka Cancer Center

h.kenmotsu@scchr.jp+81-55-989-5222

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Sep 19, 2026