A Safety and Antitumor Activity Trial of Immunoradiotherapy Combinations as a Treatment Option for Subjects With Metastatic Solid Tumors

Key Inclusion Criteria:

1. Participants with histologically confirmed non-central nervous system (CNS) solid tumor that is metastatic and for whom there is no available standard therapy.
2. At least 18 years of age.
3. Signed informed consent prior to any screening procedures.
4. Measurable disease according to RECIST v1.1.
5. Life expectancy of >3 months.
6. Qualify for palliative radiotherapy as an available option for disease management.
7. Eastern Cooperative Oncology Group (ECOG) 0-1.
8. Normal or adequate liver, renal, cardiac and bone marrow function.

Key Exclusion Criteria:

1. Prior malignancy except for non-melanoma skin cancers and in situ cancers.
2. Condition contraindicating radiotherapy.
3. Rapidly progressing disease.
4. Active, known or suspected autoimmune disease.
5. History of non-infectious pneumonitis that required steroids or currently has pneumonitis.
6. Contraindications to the use of pembrolizumab.
7. Condition requiring systemic treatment with either corticosteroids or other immunosuppressive medications within 14 days of first treatment.
8. Received an allogeneic tissue/solid organ transplant.
9. Active infection requiring systemic therapy.

Note: Other protocol defined inclusion and exclusion criteria may apply.