Bendamustine Bridge to Autologous or Allogeneic Transplant for Relapsed/Refractory Lymphoma

Inclusion Criteria:

* must have histologically or cytologically confirmed relapsed or primary refractory lymphoma (including Hodgkin's Lymphoma) staged with Positron Emission Tomography (PET) scan to have

  * Allogeneic arm:

    * Progressive disease or
    * No response to salvage therapy or
    * Partial response to salvage therapy defined as \> 50% reduction in bidirectional area of masses but standardized uptake value (SUV) remains ≥8 in at least some PET avid areas
    * Prior autologous transplant
  * Autologous arm:

    * Partial response of \>50% reduction in bidirectional area of masses and SUV reduction to \<8 in PET avid areas Subjects must have evaluable disease.
* Subjects must have received at least one induction therapy and one line of salvage therapy that each incorporate at least two drugs that are standard of care for lymphoma
* Age \>18 years.
* Karnofsky Performance Score (KPS) ≥ 50%
* For autologous transplants: Subjects must have an adequate number of CD34+ stem cells collected to allow for transplantation. This number is defined as ≥ 2x106 CD34+ cells / kg body weight. If not previously collected and stored, the subject must be willing to undergo stem cell mobilization and collection as per standard practice. If sufficient cells cannot be collected, subjects will be offered the option to proceed with the allogeneic arm of the study.
* Male and female subjects must use an effective contraceptive method during the study and for a minimum of 6 months after study treatment. Female subjects of childbearing potential must have a negative serum pregnancy test within 2 weeks prior to enrollment.
* Ability to understand and the willingness to sign a written informed consent document.

Exclusion Criteria:

* Known to be positive for HIV
* Subjects may not be receiving any other investigational agents (defined as non FDA-approved agents) at the time of initiating bendamustine regimen. However, the salvage therapy for lymphoma can be part of an ongoing clinical trial with an investigational agent.
* Women who are pregnant or breast feeding. Women of childbearing age must use adequate contraception and have a negative pregnancy test.
* The risks to an unborn fetus or potential risks in nursing infants are unknown.
* History of allergic reactions attributed to compounds of similar chemical or biologic composition to any medications listed in the protocol.
* Subject with severely decreased Left Ventricular Ejection Fraction (LVEF) or severely impaired pulmonary function tests (PFT's)
* Uncontrolled illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements.