The primary endpoint will be 6-month progression-free survival. Each cycle of therapy will be 28 days. All subjects will be assessed after every other cycle of therapy. Subjects will remain on study therapy for at least one year unless they develop progressive disease, unacceptable toxicity, non-compliance with study procedures or withdraw consent. Patients may continue treatment with oral panobinostat until they experience unacceptable toxicity that precludes further treatment, disease progression, and/or at the discretion of the investigator.