Early Ageing During Therapy in AYA Cancer Patients

This study looks at whether cancer treatment causes "early ageing" in young adults (aged 18–39) diagnosed with cancer. Researchers will measure biological age markers in the blood and track physical and cognitive changes over time to understand the long-term effects of chemotherapy and other treatments. **You may be eligible if...** - You are aged 18–39 at the time of your cancer diagnosis - You have a confirmed diagnosis of one of: leukemia, lymphoma (Hodgkin's or non-Hodgkin's), testicular cancer, osteosarcoma, Ewing sarcoma, breast cancer, or cervical cancer - You are scheduled to start systemic treatment (chemotherapy, surgery, radiation, antibodies) with curative intent **You may NOT be eligible if...** - You will be treated with immune checkpoint inhibitors or anti-angiogenesis targeted therapies - You previously received systemic treatment or radiation for a prior cancer (minor exceptions apply) Talk to your doctor to see if this trial is right for you.