Summary
This phase III trial compares the effect of adding cemiplimab immunotherapy to standard therapy (surgery with or without radiation therapy) versus standard therapy alone in treating people with stage III/IV sqaumous cell skin cancer that is able to be removed by surgery (resectable) and that may have come back after a period of improvement (recurrent).
The usual treatment for people with resectable squamous cell skin cancer is the removal of the cancerous tissue (surgery) with or without radiation, which uses high energy x-rays, particles, or radioactive seeds to kill cancer cells and shrink tumours.
Immunotherapy with monoclonal anitbodies, such as cemiplimab, may help the body's immune system attack the cancer, and may interfere with the ability of tumour cells to grow and spread. Cemiplimab has been approved for the treatment of skin cancer that has spread or that cannot be removed by surgery, but it has not been approved for the treatment of skin cancer than can be removed by surgery. Adding cemiplimab to the usual treatment of surgery with or without radiation may be more effective in treating people with stage III/IV resectable squamous cell skin cancer than the usual treatment alone.
About this study
You may be eligible for this study if you have spindle cell squamous cell carcinoma (SCC), squamous cel carcinoma with sarcomatoid differentiation, acantholytic SCC, clear cell SCC, or lymphoepithelial carcinoma. Note: Keratocanthoma SCC and Verrucous SCC subtypes are not eligible.
Eligible participants will be randomly allocated (by chance) to one of two treatment arms.
Arm 1
Participants will have standard of care surgery within 6 weeks of joining the study. About 6-12 weeks after that, participants may receive a type of targeted radiation therapy if your doctor thinks it's needed.
Arm 2
Participants will receive the immunotherapy medicine cemiplimab through an IV (a drip into your vein) every 3 weeks, for up to 4 treatments. About 3 weeks after the last dose, participants will have surgery based on how the cancer has responded. Within 12 weeks of that, participants may also receive targeted radiation therapy, if needed. If scans show that some cancer remains, participants may get more cemiplimab every 6 weeks for up to 4 more treatments.
All participants will have scans like CT, MRI, or PET/CT before and after treatment to monitor progress, and may be asked to give optional samples of tissue, blood, or plasma for research.