<qa>  What is Panobinostat?This study is for patients with relapsed or refractory Acute Lymphoblastic Leukemia ALL, Acute Myelogenous Leukemia AML, Hodgkins Disease HD or Non-Hodgkins Lymphoma NHL. Panobinostat is a new drug that is considered investigational because it has not been approved in the United States by the Food and Drug Administration FDA, or in any other country. Panobinostat is a histone deacetylase inhibitor HDACi and interferes with gene expression found in cells causing them to stop growing or die. Panobinostat has been used in several hundred adults who had leukemia, HD, NHL and other solid tumors. Panobinostat has not been given to children. 