This phase III study evaluates whether cemiplimab can shrink or prevent the return of cancer when combined with the usual approach for skin cancer more effectively than the usual approach alone. This study will enroll adults diagnosed with stage III/IV cutaneous squamous cell carcinoma. If eligible to participate in this study participants will be randomly assigned to 1 of 2 groups. Group 1 will receive the usual surgery used to treat this type of cancer. After surgery, they may get the usual type of radiation, depending on the results from the tumor tissue removed during surgery. Group 2 will receive cemiplimab before surgery every 3 weeks for up to 12 weeks. They may also receive radiation after surgery depending on the tumor tissue results from surgery. If treated with cemiplimab before surgery, then tumor tissue results will also determine whether or not they receive cemiplimab every 6 weeks for up to 24 weeks, after surgery, and radiation if given. Participants will be asked to complete quality of life questionnaires to understand how they are feeling during treatment and the effects of the treatment. Participants will be checked for sides effects 3 to 4 months for 2 years after treatment. After that, every 6 months for 1 year and then annually. The main risks are tiredness, diarrhea or constipation, nausea, rash or itching, change in thyroid function, and risk of progression of the cancer to require earlier surgery or to become inoperable. Alternatives to this treatment is standard of care surgery and radiation. The study benefit is cemiplimab may help in shrinking or stabilizing this type of skin cancer.

The purpose of this study is to learn more about long-term safety (good or bad effects) of avacopan and its efficacy (how well it is working) in treatment of antineutrophil cytoplasmic autoantibody (ANCA)-associated vasculitis.

Avacopan is currently approved as an adjunctive (another treatment used along with primary treatment) treatment in adult people with severe active ANCA-associated vasculitis in the US and is also approved in the EU, Canada, Japan, and other countries.

In this study, avacopan will be compared with a placebo (a drug that looks likes the study medication but does not contain any medication). This is a randomized study, meaning that you will be assigned by chance (like flipping a coin) into a treatment group. You will have an equal chance of being placed in either of the 3 following groups: treatment with avacopan for 5 years in group A, or treatment with avacopan for 1 year followed by placebo for 4 years in group B, or treatment with placebo for 5 years in group C. The study is also a double-blinded study, meaning you and your study doctor will not know what you are receiving, the avacopan or placebo.

The study is sponsored by Amgen, Inc. Participation in the study will require 27 visits to the MUSC main campus over approximately 63 months, and visits will include the following procedures: blood draw, urine collection, physician-led assessments of your disease (for example physical exam and medical history review), and health questionnaires. You will also be provided with a paper diary to record any missed doses/overdoses of the study drug.

Compensation is available for participation.