Phase II Basket Study to Evaluate the Tissue-agnostic Efficacy of Anti-Programmed Cell Death Protein 1 Anti-PD1 Monoclonal Antibody Nivolumab in Patients With Advanced Rare Tumors

What this Trial Is About

Researchers are evaluating the tissue-agnostic effectiveness of the anti-PD1 antibody nivolumab in patients with advanced or metastatic rare tumors that express PD-L1 with a combined positive score of 10 or higher. This phase II basket trial includes patients whose cancers have progressed despite standard treatments. Rare tumors, defined by low incidence rates, collectively represent a significant portion of cancers with generally poor prognosis and limited clinical trial representation. Participants receive intravenous nivolumab at a dose of 480 mg every 4 weeks, continuing until disease progression, limiting toxicity, or for up to 12 months if responses are stable or improving. After treatment ends or discontinuation, patients are followed by phone every 60 days until death. This innovative approach targets the molecular characteristic PD-L1 regardless of tumor origin, aiming to provide new therapeutic options across many rare cancer types. During the study, researchers assess tumor response using RECIST v1.1 criteria and monitor biomarkers including PD-L1 expression, circulating tumor DNA, and microvesicles to understand treatment effects. Patients undergo regular evaluations to measure objective response and progression-free survival. Safety is closely monitored throughout the treatment and follow-up periods. The study is conducted across multiple centers to overcome challenges in rare cancer research and is expected to last about four years.

Agnostic Therapy in Rare Solid Tumors