MCPyV TAg-specific Polyclonal Autologous CD8-positive T Cells(NCI)

This phase I/II trial studies the side effects and how well localized radiation therapy or recombinant interferon beta and avelumab with or without cellular adoptive immunotherapy works in treating patients with Merkel cell carcinoma that has spread to other parts of the body. Radiation therapy uses high energy x-rays to kill tumor cells and shrink tumors. Interferon beta is a substance that can improve the body's natural response and may interfere with the growth of tumor cells. Monoclonal antibodies, such as avelumab, may help T lymphocytes kill tumor cells. For cellular adoptive immunotherapy, specific white blood cells are collected from the patient's blood and treated in the laboratory to recognize Merkel cell carcinoma. Infusing these cells back into the patient may help the body build an effective immune response to kill Merkel cell carcinoma. Giving localized radiation therapy or recombinant interferon beta and avelumab with or without cellular adoptive immunotherapy may be a better treatment for Merkel cell carcinoma.