RecruitingPhase 2Drug trialAll-Trans Retinoic Acid (ATRA) Plus PD-1 Inhibition in Recurrent IDH-Mutant GliomaThis is a Phase II study of the combination of All-Trans Retinonic Acid (ATRA) and PD-1 inhibition (Retifanlimab) in patient with recurrent IDH-mutant glioma. The Sponsor-Investigator hypothesizes that the proposed regimen will be safe and stimulate a robust anti-tumor immune response.