A Study of Atezolizumab Plus Bevacizumab Versus Active Surveillance as Adjuvant Therapy in Patients With Hepatocellular Carcinoma at High Risk of Recurrence After Surgical Resection or Ablation

To be part of this study, you would generally need to have been recently diagnosed with a specific type of liver cancer (HCC) and have had it completely removed by surgery or a procedure like radiofrequency or microwave ablation. You also need to have fully recovered from that procedure within a certain timeframe, typically 4-12 weeks before joining. Importantly, your doctors must believe you are at a high risk of your cancer coming back.

There are also some general health requirements. For example, your liver should be working fairly well, and you should be able to carry out your normal daily activities without too much difficulty. For women who could become pregnant, and for men, strict contraception will be required during the study. You would also need to provide a sample of your original tumour tissue if you had surgery.

Some things would prevent you from joining, such as if scans show your cancer has already returned or spread, or if you have certain other serious health conditions like specific types of autoimmune diseases. If you have been treated with a procedure called TACE more than once after your surgery, you also wouldn't be able to join. The study also cannot include individuals with certain rare types of liver cancer.

If you decide to take part in this study, you would first undergo a series of medical checks and tests to confirm you are eligible. Once enrolled, you would either receive the study drugs (atezolizumab and bevacizumab) or be placed into the active surveillance group, which means having regular check-ups and scans. This decision is made randomly, like flipping a coin.

If you are in the drug treatment group, you would receive these medications as infusions (through a drip into your vein) over a period of time, likely at regular intervals. Throughout the study, all participants will have frequent visits to the clinic for blood tests, physical examinations, and scans (like CT or MRI) to monitor your health and check for any signs of the cancer returning or any side effects from the treatment. The total duration of active treatment and follow-up will be carefully explained to you by the study team.