Adam Lever been in remission from osteosarcoma, a bone cancer, for 10 years.

Source: https://www.independent.co.uk/news/uk/university-of-nottingham-nottingham-facebook-adam-b2319800.html

The event also included a heartfelt speech by Sarah Dransfield, an ambassador for Project Youth Cancer who was diagnosed with osteosarcoma when she was 16 and resultingly had her right leg amputated above the knee.

Source: https://www.dewsburyreporter.co.uk/business/annual-business-event-raises-ps30000-to-help-young-people-across-kirklees-and-calderdale-4446233

With data already obtained showing that the, so called "niclosamide stearate prodrug therapeutic" (NSPT) can stop the formation of lung metastases in a mouse model of osteosarcoma, and also actually cure some dogs in a small canine feasibility study.

Source: https://phys.org/news/2023-03-brain-tumor-discovery-paves-drug.html