Study of Ibrutinib in Relapsed and Refractory T-cell Lymphoma

This is a Phase 1 clinical trial, a type of research study. The purpose of this phase 1 clinical trial is to find out whether a new study drug, ibrutinib, is safe in patients with T-cell non-Hodgkin lymphoma that has either come back or not responded to treatment. In this phase 1 study, different doses of ibrutinib (560 mg and 840 mg daily) will be tested to see what effect the drug has on the patient and the disease.