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Primary Mediastinal (Thymic) Large B-Cell LymphomaPhase 2NCT03210662

Pembrolizumab and External Beam Radiation Therapy in Treating Patients With Relapsed or Refractory Non-Hodgkin Lymphoma

A Phase 2 study testing External Beam Radiation Therapy and Pembrolizumab in people with Primary Mediastinal (Thymic) Large B-Cell Lymphoma and Recurrent Aggressive Non-Hodgkin Lymphoma, run by M.D. Anderson Cancer Center at 1 site in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
Search all trials

Trial summary

This phase II trial studies how well pembrolizumab and external beam radiation therapy work in treating patients with non-Hodgkin lymphoma that has come back (relapsed) or does not respond to treatment (refractory). Read more about this study

Who is it for?
Ages 18 years and older
What is being tested?
External Beam Radiation Therapy and Pembrolizumab
Could I receive a placebo?
No, everyone receives an active treatment
How many people
17 participants
Where
1 siteUnited States
Study dates
1 Feb 2018to 31 Oct 2025
Phase
Phase 2
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Have at least one site of lymphomatous disease amenable to external beam radiation therapy (EBRT)
  • Have pathologic confirmation of aggressive non-Hodgkin lymphoma (including diffuse large B cell lymphoma, transformed follicular lymphoma, transformed marginal zone lymphoma, primary mediastinal B-cell lymphoma, T cell lymphoma and NK T-cell lymphoma). Patients with indolent B cell lymphoma are excluded
  • Be willing and able to provide written informed consent/assent for the trial
  • Have measurable disease (>= 1.5 cm in the longest diameter for nodal or extranodal disease)
  • Have provided archival tumor tissue sample or newly obtained core or excisional biopsy of a tumor lesion not previously irradiated. Formalin-fixed, paraffin embedded (FFPE) tissue blocks are preferred to slides. Newly obtained biopsies are preferred to archived tissue. Newly-obtained is defined as a specimen obtained up to 6 weeks (42 days) prior to initiation of treatment on day 1. Subjects for whom newly-obtained samples cannot be provided (e.g. inaccessible or subject safety concern) may submit an archived specimen. Note: If submitting unstained cut slides, newly cut slides should be submitted to the testing laboratory within 14 days from the date slides are cut
  • Have an Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1. Evaluation of ECOG is to be performed within 7 days prior to the date of allocation/randomization
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  • Absolute neutrophil count (ANC) >= 1,000 /mcL (performed within 10 days of treatment initiation)
  • Platelets >= 50,000 / mcL (performed within 10 days of treatment initiation)
  • Hemoglobin >= 8 g/dL or >= 5.6 mmol/L without transfusion or erythropoietin (EPO) dependency (within 7 days of assessment) (performed within 10 days of treatment initiation)
  • Serum creatinine OR measured or calculated creatinine clearance (creatinine clearance should be calculated per institutional standard) (glomerular filtration rate [GFR] can also be used in place of creatinine or creatinine clearance [CrCl]) =< 1.5 x upper limit of normal (ULN) OR >= 60 mL/min for subject with creatinine levels > 1.5 x institutional ULN (performed within 10 days of treatment initiation)
  • Serum total bilirubin =< 1.5 x ULN OR direct bilirubin =< ULN for subjects with total bilirubin levels > 1.5 ULN (performed within 10 days of treatment initiation)
  • Aspartate aminotransferase (AST) serum glutamic-oxaloacetic transaminase (SGOT) and alanine aminotransferase (ALT) serum glutamic pyruvic transaminase (SGPT) =< 2.5 x ULN OR =< 5 x ULN for subjects with liver metastases (performed within 10 days of treatment initiation)
  • Albumin >= 2.5 mg/dL (performed within 10 days of treatment initiation)
  • International normalized ratio (INR) or prothrombin time (PT) =< 1.5 x ULN unless subject is receiving anticoagulant therapy as long as PT or partial thromboplastin time (PTT) is within therapeutic range of intended use of anticoagulants (performed within 10 days of treatment initiation)
  • Activated partial thromboplastin time (aPTT) =< 1.5 x ULN unless subject is receiving anticoagulant therapy as long as PT or PTT is within therapeutic range of intended use of anticoagulants (performed within 10 days of treatment initiation)
  • Female subject of childbearing potential should have a negative urine or serum pregnancy within 72 hours prior to receiving the first dose of study medication. If the urine test is positive or cannot be confirmed as negative, a serum pregnancy test will be required
  • Female subjects of childbearing potential must be willing to use an adequate method of contraception as outlined - contraception, for the course of the study through 120, corresponding to time needed to eliminate any Merck study treatment(s) and/or any active comparator/combination, plus 30 days (a menstruation cycle) for study treatments with risk of genotoxicity days after the last dose of study medication. Note: Abstinence is acceptable if this is the usual lifestyle and preferred contraception for the subject

Who cannot join

  • Has had prior radiation therapy to the potential radiation target such that additional radiation therapy is considered unsafe by the treating radiation oncologist
  • Has a history of allogeneic stem cell transplantation
  • Has a diagnosis of active scleroderma or lupus or any other autoimmune disease that by the opinion of the treating radiation oncologist would put the patient at unacceptable risk of toxicity
  • Is currently participating and receiving study therapy or has participated in a study of an investigational agent and received study therapy or used an investigational device within 4 weeks of the first dose of treatment
  • Has a diagnosis of immunodeficiency or is receiving systemic steroid therapy or any other form of immunosuppressive therapy within 7 days prior to the first dose of trial treatment
  • Has a known history of active Bacillus tuberculosis (TB)
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  • Hypersensitivity to pembrolizumab or any of its excipients
  • Has had a prior anti-cancer monoclonal antibody (mAb) within 4 weeks prior to study day 1 or who has not recovered (i.e., =< grade 1 or at baseline) from adverse events due to agents administered more than 4 weeks earlier
  • Has had prior chemotherapy, targeted small molecule therapy, or radiation therapy within 2 weeks prior to study day 1 or who has not recovered (i.e., =< grade 1 or at baseline) from adverse events due to a previously administered agent
  • Note: subjects with =< grade 2 neuropathy are an exception to this criterion and may qualify for the study
  • Note: if subject received major surgery, they must have recovered adequately from the toxicity and/or complications from the intervention prior to starting therapy
  • Has a known additional malignancy that is progressing or requires active treatment within the past 3 years. Exceptions include basal cell carcinoma of the skin or squamous cell carcinoma of the skin that has undergone potentially curative therapy or in situ cervical cancer
  • Has known active central nervous system (CNS) lymphoma or lymphomatous meningitis. Subjects with previously treated brain metastases may participate provided they are stable (without evidence of progression by imaging for at least four weeks prior to the first dose of trial treatment and any neurologic symptoms have returned to baseline), have no evidence of new or enlarging brain metastases, and are not using steroids for at least 7 days prior to trial treatment
  • Has active autoimmune disease that has required systemic treatment in the past 2 years (i.e. with use of disease modifying agents, corticosteroids or immunosuppressive drugs). Replacement therapy (e.g., thyroxine, insulin, or physiologic corticosteroid replacement therapy for adrenal or pituitary insufficiency, etc.) is not considered a form of systemic treatment
  • Has history of (non-infectious) pneumonitis that required steroids, evidence of interstitial lung disease or active, non-infectious pneumonitis
  • Has an active infection requiring systemic therapy
  • Has a history or current evidence of any condition, therapy, or laboratory abnormality that might confound the results of the trial, interfere with the subject's participation for the full duration of the trial, or is not in the best interest of the subject to participate, in the opinion of the treating investigator
  • Has known psychiatric or substance abuse disorders that would interfere with cooperation with the requirements of the trial
  • Is pregnant or breastfeeding, or expecting to conceive or father children within the projected duration of the trial, starting with the pre-screening or screening visit through 120 days after the last dose of trial treatment
  • A woman of child bearing potential (WOCBP) who has a positive urine pregnancy test within 72 hours prior to receiving the first dose of study medication. If the urine test is positive or cannot be confirmed as negative, a serum pregnancy test will be required. Note: in the event that 72 hours have elapsed between the screening pregnancy test and the first dose of study treatment, another pregnancy test (urine or serum) must be performed and must be negative in order for subject to start receiving study medication
  • Has received prior therapy with an anti-PD-1, anti-PD-L1, or anti-PD-L2 agent directed to another stimulatory or co-inhibitory T-cell receptor (e.g., CTLA-4, OX-40, CD137)
  • Has a known history of human immunodeficiency virus (HIV) (HIV 1/2 antibodies)
  • Has known active hepatitis B (e.g., hepatitis B surface antigen [HBsAg] reactive) or hepatitis C (e.g., hepatitis C virus [HCV] ribonucleic acid [RNA] [qualitative] is detected)
  • Has received a live vaccine within 30 days of planned start of study therapy. Note: seasonal influenza vaccines for injection are generally inactivated flu vaccines and are allowed; however intranasal influenza vaccines (e.g., Flu-Mist) are live attenuated vaccines, and are not allowed

Trial locations and contacts

1 site in 1 country.

United States1 site

  • M D Anderson Cancer Center

    Houston, Texas, 77030

Other trials in United States

About this study

Official title: Phase II Study of Pembrolizumab and Fractionated External Beam Radiotherapy in Patients With Relapsed and Refractory Non-Hodgkin Lymphoma

This phase II trial studies how well pembrolizumab and external beam radiation therapy work in treating patients with non-Hodgkin lymphoma that has come back (relapsed) or does not respond to treatment (refractory). Immunotherapy with monoclonal antibodies, such as pembrolizumab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. Giving pembrolizumab and external beam radiation therapy may work better in treating patients with non-Hodgkin lymphoma than pembrolizumab alone.

Read the detailed description

PRIMARY OBJECTIVES:

  1. To determine the overall response rate (ORR) of pembrolizumab with concurrent fractionated external beam radiotherapy (EBRT) among patients with relapsed and refractory non-Hodgkin lymphoma (NHL).

SECONDARY OBJECTIVES:

  1. To determine the safety of pembrolizumab with fractionated EBRT in patients with relapsed and refractory NHL.

II. To determine the overall response rate and complete response rate (CRR) of irradiated and non-irradiated lesions to treatment with concurrent pembrolizumab and fractionated EBRT in patients with relapsed and refractory NHL.

III. To determine the progression free survival (PFS) of pembrolizumab in combination with fractionated EBRT.

IV. To determine the overall survival (OS) of pembrolizumab in combination with fractionated EBRT.

  1. To determine the duration of response of irradiated and non-irradiated lesions after concurrent pembrolizumab and fractionated EBRT.

EXPLORATORY OBJECTIVES:

  1. To identify tumor and peripheral blood markers predictive of response to concurrent pembrolizumab and low to moderate dose EBRT in the setting of relapsed and refractory NHL.

II. To determine if a course of hypo-fractionated EBRT can improve response after progressive disease among patients treated with fractionated EBRT and pembrolizumab.

OUTLINE:

Beginning on day 1, patients undergo fractionated EBRT daily for 5 consecutive days a week for up to 12 or 22 treatments. Patients also receive pembrolizumab intravenously (IV) over 1 hour on day 2. Treatment with pembrolizumab repeats every 21 days for up to 35 cycles in the absence of disease progression or unacceptable toxicity.

After completion of study treatment, patients are followed up at 30 days, every 3 months for 1 year and then every 6 months thereafter.

Being tested
External Beam Radiation Therapy, Pembrolizumab
Medical subject headings
Lymphoma, T-Cell, Lymphoma, Non-Hodgkin

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • External Beam Radiation TherapyRadiation

    Also called Definitive Radiation Therapy, EBRT, External Beam Radiotherapy, External Beam RT

    Undergo EBRT

  • PembrolizumabBiological

    Also called Keytruda, Lambrolizumab, MK-3475, SCH 900475

    Given IV

Study groups in NCT03210662
Study groupRoleWhat they receive
Treatment (EBRT, pembrolizumab)ExperimentalBeginning on day 1, patients undergo fractionated EBRT daily for 5 consecutive days a week for up to 12 or 22 treatments. Patients also receive pembrolizumab IV over 1 hour on day 2. Treatment with pembrolizumab repeats every 21 days for up to 35 cycles in the absence of disease progression or unacceptable toxicity.
Receives: Radiation: External Beam Radiation Therapy; Biological: Pembrolizumab

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Overall Response Rate of Pembrolizumab With Concurrent Fractionated External Beam Radiotherapy (EBRT) Among Patients With Relapsed and Refractory Non-Hodgkin Lymphoma (NHL)

    Disease response will be assessed via revised Lugano classification for the response assessment of Hodgkin and non-Hodgkin lymphoma. The end of treatment assessment is determined by positron emission tomography (PET)-computed tomography (CT) imaging for patients with fluoro-deoxyglucose (FDG) avid hematologic malignancies. For patients with FDG-avid disease, the Deauville Criteria will be utilized for PET-CT scoring on a 5 point 5-point scale, in accordance with standard response criteria. A score of 1-3 is considered negative a score of 4-5 is considered positive for the presence of active lymphoma.

    Measured: Every 3 months until withdrawal of consent, becoming lost to follow-up, or death (an average of 14 months).

Secondary outcomes (4)

  1. Progression Free Survival

    Disease response will be assessed via revised Lugano classification for the response assessment of Hodgkin and non-Hodgkin lymphoma. The end of treatment assessment is determined by positron emission tomography (PET)-computed tomography (CT) imaging for patients with fluoro-deoxyglucose (FDG) avid hematologic malignancies. For patients with FDG-avid disease, the Deauville Criteria will be utilized for PET-CT scoring on a 5 point 5-point scale, in accordance with standard response criteria. A score of 1-3 is considered negative a score of 4-5 is considered positive for the presence of active lymphoma.

    Measured: 1.8 ~ 6.5 months

  2. Overall Survival

    The measurement of overall survival of patients from the start of trial participation until the death of the patient.

    Measured: Every 3 months until withdrawal of consent, becoming lost to follow-up, or death.

  3. Overall and Complete Response Rate of Irradiated vs Non-Irradiated Lesions

    Measured: Every 3 months until withdrawal of consent, becoming lost to follow-up, or death (an average of 14 months).

  4. Safety of Pembrolizumab With Fractionated EBRT

    Assessing patients who discontinued study treatment due to toxicity/safety concerns

    Measured: Through Study Completion (an average of 14 months)

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted7 Jul 2017
  2. Study start1 Feb 2018
  3. Primary completion28 Oct 2025
  4. Study completion31 Oct 2025

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
17 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03210662
Sponsor's protocol ID
2017-0341
Other IDs
NCI-2018-01123, 2017-0341
Status last verified
Jan 2026
First submitted
5 Jul 2017
Last updated
13 Jan 2026
Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing External Beam Radiation Therapy and Pembrolizumab in people with Primary Mediastinal (Thymic) Large B-Cell Lymphoma and Recurrent Aggressive Non-Hodgkin Lymphoma, run by M.D. Anderson Cancer Center at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 17 inclusion and 24 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 13 Jan 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 13 Jan 2026). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Overall Response Rate of Pembrolizumab With Concurrent Fractionated External Beam Radiotherapy (EBRT) Among Patients With Relapsed and Refractory Non-Hodgkin Lymphoma (NHL) (time frame: Every 3 months until withdrawal of consent, becoming lost to follow-up, or death (an average of 14 months).). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT03210662.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 13 Jan 2026.

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