Tofacitinib in Recurrent GBM Patients

Once consented and registered, eligible patients will commence Cycle 1 and be assessed on Cycle 1 Day 1. An entire cycle will be 28 days of continuous Tofacitinib dosing. There will be a gap of 18-24 days between the first and subsequent cycles of treatment. The patient will once again be assessed on Cycle 2 Day 1. An interim follow-up will be done after the second cycle, during which the patient will undergo a brain MRI for tumor measurements along with all other assessments. Subsequent cycles will continue as prior, with subject assessments, brain MRI, and toxicity evaluations every 4 weeks. Treatments will stop upon evidence of disease progression, unacceptable toxicity, or if the physician deems it unsafe for the subject to continue in the study.