Study Status: Recruiting
Recruit Status: Recruiting
Study Type: Interventional
Official Title: A Multicenter Phase 2 Study of the Bruton's Tyrosine Kinase Inhibitor PCI-32765 (Ibrutinib) for Treatment of Relapsed Hairy Cell Leukemia
Brief Summary: This phase II trial studies how well ibrutinib works in treating patients with hairy cell leukemia that has returned after a period of improvement. Ibrutinib may stop the growth of cancer cells by blocking some of the enzymes needed for cell growth.