The purpose of this study is to determine if a subcutaneous (SC) dosing schedule of veltuzumab can be established in NHL or CLL patients and to confirm the safety and efficacy of veltuzumab that was previously established when administered intravenously.

The first study of veltuzumab given IV weekly in NHL patients (IM-T-hA20-01) has shown excellent tolerability and even efficacy at weekly intravenous doses as low as 80-120 mg/m2 over 4 consecutive weeks. These clinical results confirm experiments laboratory studies. Laboratory studies using Veltuzumab administered subcutaneously showed potent activity based on B-cell depletion. The current study's goal is to determine if a subcutaneous (SC) dosing schedule of veltuzumab can be established in patients with NHL or CLL

Inclusion Criteria:

• Histologically confirmed diagnosis of CD20 positive chronic lymphocytic leukemia (CLL)
• Either previously untreated or relapsed
• Measurable disease (at least one lesion > 1.5 cm for NHL, or ALC > 5,000 for CLL) see full protocol for additional criteria

Exclusion Criteria:

• Previously untreated NHL patients with Stage I and II disease (Ann Arbor classification)
• Previously untreated CLL patients with Stage 0-2 disease (Rai classification) unless specific treatment indications by NCCN guidelines exist (symptomatic, recurrent infections, end-organ function, cytopenias and steady disease progression).

see full protocol for additional criteria