A Phase 2 Trial of Rituximab and Corticosteroid Therapy for Newly Diagnosed Chronic Graft Versus Host Disease

Inclusion Criteria: Children and adults with a new diagnosis of chronic GVHD- that requires systemic immunosuppressive treatment to a dose of 1mg/kg/day prednisone and who have undergone any type of donor hematopoietic cell graft or conditioning regimen. Stable doses of other immunosuppressive medications (e.g. calcineurin inhibitors, mycophenolate mofetil) for 2 weeks prior to enrollment. In addition, these other immunosuppressive medications should not be dose increased. Men and women of reproductive potential must agree to use an acceptable method of birth control during treatment and for six months after completion of treatment. All subjects must provide written informed consent. Exclusion Criteria: Known life-threatening hypersensitivity to Rituximab or other anti-B cell antibody. Treatment with prednisone (or equivalent) at doses higher than 1 mg/kg/day at the time of enrollment. Persistent prednisone treatment of acute GVHD that is less than 1mg/kg is allowed. Active, uncontrolled infection- CMV reactivation is excluded (i.e. pneumonitis, colitis). Peripheral blood CMV reactivation is allowed as long as it is not associated with CMV disease and is responding to therapy. Known Hepatitis B surface Ag positive Active malignant disease relapse. Pregnancy Lactating Inability to comply with the Rituximab treatment regimen.