About this study
This study looks for effective treatments for childhood solid tumors that have returned after treatment or have never responded to therapy.
Some of these tumors may respond to a type of therapy called immunotherapy. This therapy helps the patient’s immune system see the tumor better and kill it. Disorganized blood vessels make it harder for immunotherapy to work. Immunotherapy may work better if we give medicines to change the blood vessels.
Atezolizumab is a form of immunotherapy. It is active in multiple cancer types. We already know that low-dose cyclophosphamide, bevacizumab, and sorafenib are safe. These medicines effectively target the blood vessels. We want to see how combining those 3 drugs with atezolizumab can help patients.
Eligibility overview
Part 1
- 1–30 years old
- Diagnosis of a solid tumor that has grown or has come back after treatment
- Ability to biopsy the tumor
Part 2
- 1–30 years old
- Diagnosis of:
- Hepatocellular carcinoma that has grown or has come back after treatment
- Fibrolamellar hepatocellular carcinoma
- Desmoplastic small round cell tumor
- A malignant rhabdoid tumor that is not in the central nervous system
- Ability to biopsy the tumor