Impact of Chemotherapy on Urinary Biomarkers and Non-Invasive Urodynamics in Children

This study looks at whether specific chemotherapy drugs (vincristine and/or doxorubicin) given during childhood cancer treatment cause long-term bladder and bowel problems. It measures urinary biomarkers and non-invasive bladder tests in children who finished chemotherapy at least a year ago. **You may be eligible if...** - You are a child aged 5–13 years old - You have a history of cancer - You were treated with vincristine and/or doxorubicin as part of your chemotherapy - You finished chemotherapy at least one year before enrolling **You may NOT be eligible if...** - You had a tumor in the pelvis - You received radiation to the pelvis - You had pre-existing bladder or bowel problems before cancer treatment - You have a spinal defect or neurological disorder - You had a brain tumor or brain metastases - Your chemotherapy included cyclophosphamide or ifosfamide Talk to your doctor to see if this trial is right for you.