| Inclusion Criteria: | 1) Male or female >/= 18 years old.
2) Histological diagnosis of CD20+ B-cell NHL (all grades) by WHO lymphoma criteria.
3) Failed at least one prior standard chemotherapy regimen or rituximab treatment for NHL.
4) Measureable NHL disease by CT, with at least one lesion >/= 1.5 cm in one dimension.
5) Adequate performance status (>/= 70 Karnofsky scale, 0-1 ECOG) with an estimated life expectancy of at least 6 months.
6) Adequate hematologic status, without ongoing transfusional support (hemoglobin >/= 10g/dL, ANC >/= 1.5 x 10^9/L, platelets >/= 100 x 10^9/L)
7) Adequate renal and hepatic function, defined as: Creatinine </= 1.5 x Institution Upper Limit of Normal (IULN), bilirubin </= 1.5 x IULN, AST and ALT </= 2.5 x IULN
8) Otherwise < Grade 1 toxicity at study entry by NCI CTC version 3.0, including recovery from all acute toxicities incurred as a result of previous surgery, radiotherapy or chemotherapy, whether investigational or conventional.
9) At least 12 months beyond previous rituximab treatment, 12 weeks beyond autologous stem cell transplant, 4 weeks beyond chemotherapy, other experimental treatments, or any radiation therapy to the index lesion(s).
10) Ability to provide signed, informed consent. |