Inclusion Criteria:

1. Age less than physiologic 68 years.

2. Patients with NHL and HL with an indication for allogeneic transplantation as
follows:

- Aggressive lymphoma and Hodgkin lymphoma; relapse after autologous transplants

- Follicular lymphoma; failure of at least one prior regimen

3. Disease must be at chemo-sensitive or stable status to prior therapy before
transplant.

4. Patients must have an HLA matched related or unrelated donor willing to donate either
peripheral blood stem cells or bone marrow. Matching is based on high-resolution
class I (HLA-A, -B, -C) and class II (HLA-DRB1, -DQB1) typing. The goal is to
transplant > 3 x 106 CD34+ cells per kg body weight of the recipient

5. Patients must sign written informed consent

6. Adequate birth control in fertile patients

Exclusion Criteria:

1. Overt progressive disease prior to transplantation.

2. Bilirubin > 3.0 mg/dl, transaminases > 3 times upper normal limit

3. Creatinine > 2.0 mg/dl

4. ECOG-Performance status > 2

5. Uncontrolled infection

6. Pregnancy or lactation

7. Abnormal lung diffusion capacity (DLCO < 40% predicted)

8. Severe cardiovascular disease

9. CNS disease involvement

10. Pleural effusion or ascites > 1 liter

11. Known hypersensitivity to fludarabine or treosulfan

12. Psychiatric conditions/disease that impair the ability to give informed consent or to
adequately co-operate