LEVEL trial aims to demonstrate the higher efficacy of 177Lu-edotreotide over everolimus in patients with well to moderately differentiated neuroendocrine tumors of the lung and thymus who require systemic therapy. It is hypothesized that 177Lu-edotreotide may significantly increase the progression-free survival (PFS) compared to everolimus in lung and thymic carcinoids.
Institutional Review Board (IRB)/Independent Ethics Committee (IEC) approved written informed consent.
Patients ≥ 18 years of age.
Patients who have histologically confirmed metastatic or locally advanced unresectable well/moderately differentiated; World Health Organization (WHO]) 2015 criteria; neuroendocrine tumor of lung (typical and atypical carcinoids) or thymus origin either functioning or non-functioning.
Patients must have the appropriate pathological features based on WHO classification, and description of proliferation activity as indicated by mitotic count per 10 high-power fields (HPF) and presence of necrosis, or Ki67 index.
Patients who are not able to swallow tablets.
Patients with poorly-differentiated or high-grade neuroendocrine carcinoma (i.e. large cell neuroendocrine carcinoma of lung, small cell lung cancer) or mixed tumors (i.e. adenocarcinoid tumor) are not eligible.
Patients with brain mets unless stable on treatment for > 12 weeks and with no evidence of raised intracranial pressure or mass effect.
Patients who have ongoing clinically significant toxicity (Grade 2 or higher with the exception of alopecia) associated with prior treatment (including systemic therapy, radiotherapy or surgery).
Parallel
177Lu-edotreotide
Drug6 cycles of 7.5 ± 0.7 Giga becquerel (GBq) 177Lu-edotreotide
Everolimus
Drug10 mg orally once daily (QD)
Progression-free survival (PFS)
Progression-free survival (PFS) defined as the time from the date of randomization to the date of first documentation of disease progression according to RECIST 1.1 by investigator-assessment or death due to any cause, whichever occurs first. In the primary analysis, PFS will be censored at the date of the last adequate tumor assessment if no PFS event is observed prior to the analysis cut-off date.
Objective response rate (ORR)
Assessed by the investigator through imaging follow-up (CT scan/MRI) using RECIST v1.1. This will be considered as the percentage/proportion of randomized patients with confirmed complete response (CR) or partial response (PR) as their overall best response throughout the study period.
Disease control rate (DCR)
Percentage/proportion of randomized patients with complete response (CR) or partial response (PR), according to ORR definition for the trial, or maintained stable disease (SD) as their overall best response, assessed by imaging follow-up (CT scan/MRI) and RECIST v1.1 criteria. Stable disease should be maintained for at least 4 months to be considered as a DCR event.
Duration of response (DoR)
Time from first confirmed response (CR or PR), according to ORR definition for the trial, to the date of the documented PD as determined using RECIST v1.1 criteria or death due to any cause, whichever occurs first. Those patients with response and without PD or death event will be censored on the date of their last tumor assessment.
Overall Survival (OS)
Defined as the time elapsed from randomization until death from any cause. We will assess the median OS, estimated by Kaplan-Meier. Patients alive and free of events at the date of the analysis will be censored at their last known contact.
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