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Study on Short vs. Long Immunotherapy with Pembrolizumab and Nivolumab for Patients with High-Risk Skin Melanoma After Surgery

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What is this trial about?

A plain-language summary of the goals, design and what participants do

This clinical trial is focused on studying the treatment of cutaneous malignant melanoma, a type of skin cancer. The study will use two medications: KEYTRUDA (pembrolizumab) and OPDIVO (nivolumab). Both medications are given as a solution for infusion, which means they are administered directly into the bloodstream through a vein.

The purpose of the study is to determine if a shorter duration of treatment with these medications is as effective as a longer one. Specifically, it will compare the effects of 6 months of treatment to 12 months of treatment in patients who have undergone radical surgery for high-risk melanoma. The study aims to see if the shorter treatment duration can provide the same benefits in preventing the cancer from returning or spreading.

Participants in the study will receive either KEYTRUDA or OPDIVO after their surgery. The study will monitor the patients over time to assess their health and the effectiveness of the treatment. The main focus will be on how long patients remain free from distant metastases, which are cancer cells that have spread to other parts of the body, and how long they remain free from any signs of cancer returning. Additionally, the study will look at the overall survival of the patients, which refers to the length of time they live after starting the treatment.

The research process

The trial runs in 6 steps – from screening to follow-up. Each step says what happens and what the team monitors.

  1. Step 1

    Joining the study

    Upon joining the study, you will be informed about the purpose and procedures involved. This study aims to compare the effectiveness of short-term versus long-term immunotherapy after surgery for high-risk skin cancer known as cutaneous malignant melanoma.

  2. Step 2

    Initial assessment

    An initial assessment will be conducted to confirm your eligibility. This includes ensuring you have undergone radical surgery for stage IIb-c, III, or IV melanoma and have a performance status of WHO 0-1, which indicates your ability to carry out daily activities.

  3. Step 3

    Randomization

    You will be randomly assigned to one of two groups. One group will receive immunotherapy for 6 months, and the other for 12 months. This process is random to ensure unbiased results.

  4. Step 4

    Treatment administration

    You will receive either pembrolizumab or nivolumab as a solution for infusion. Pembrolizumab is administered as a 25 mg/mL concentrate, and nivolumab as a 10 mg/mL concentrate. The infusion will be given at regular intervals as determined by the study protocol.

  5. Step 5

    Monitoring and follow-up

    Throughout the treatment period, regular monitoring will be conducted to assess your health and the effectiveness of the treatment. This includes checking for any side effects and measuring outcomes like distant metastatic free survival and relapse free survival.

  6. Step 6

    Completion of treatment

    After completing the assigned treatment duration, a final assessment will be conducted. This will help determine the overall survival and effectiveness of the treatment in preventing cancer recurrence.

Who can join the trial?

4 criteria

  • Must have a performance status of WHO 0-1, which means you are fully active or have some symptoms but can still carry out light work.
  • Must have had radical surgery for cutaneous malignant melanoma, which is a type of skin cancer, at stage IIb-c, III, or IV.
  • Must be within the age range of 18 to 64 years old.
  • Both males and females can participate.

Who cannot join the trial?

4 criteria

  • Patients who do not have cutaneous malignant melanoma cannot participate. This is a type of skin cancer.
  • Patients who are not in stages IIb-c, III, or IV of cutaneous malignant melanoma cannot participate. These stages describe how advanced the cancer is.
  • Patients who are not within the specified age range cannot participate. The age range includes adults and older adults.
  • Patients who are part of a vulnerable population cannot participate. This means people who might need special protection or care.
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Investigated drugs

Immunotherapy is a type of treatment that helps your immune system fight cancer. In this trial, it is used after surgery to help prevent the melanoma from coming back. The study is looking at whether taking immunotherapy for 6 months is as effective as taking it for 12 months. This treatment works by boosting your body's natural defenses to recognize and attack cancer cells.

What is already known about the treatment

Immunotherapy – This medication is administered as an adjuvant treatment, which means it is given after the primary treatment, such as surgery, to help prevent cancer from returning. It is used in the form of injections or infusions, depending on the specific type of immunotherapy. Currently, immunotherapy is a well-established treatment in medicine, especially for certain types of cancer, including cutaneous malignant melanoma. The main therapeutic indication for this medication is to treat patients with stage IIb-c, III, and IV cutaneous malignant melanoma. At the molecular level, immunotherapy works by stimulating the body's immune system to recognize and attack cancer cells more effectively. It is classified pharmacologically as a type of cancer treatment that enhances the immune response against tumors.

Investigated diseases

Cutaneous Malignant Melanoma – This is a type of skin cancer that originates in the melanocytes, the cells responsible for producing melanin, the pigment that gives skin its color. It typically begins as a mole or a dark spot on the skin that changes in size, shape, or color over time. As the disease progresses, it can invade deeper layers of the skin and spread to other parts of the body, including lymph nodes and distant organs. The progression is often marked by the tumor's ability to grow vertically into the skin, increasing the risk of metastasis. Early stages may be confined to the epidermis, but advanced stages involve deeper tissue invasion and potential spread beyond the skin. Monitoring changes in skin lesions is crucial for early detection and management.
Trial detailsLast updated 2 Oct 2026
Age18+ yearsPhasePhase IIITrial ID2023-509994-22-00Estimated enrolment1 800 patientsSponsorNorth Estonia Medical Centre Foundation

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