The Effect of Serum Ferritin in irAE

This study is investigating whether a patient's serum ferritin (an iron-related protein) level can predict serious side effects (immune-related adverse events) in people with cancer who are receiving immunotherapy, targeted therapy, or chemotherapy. **You may be eligible if...** - You are between 18 and 75 years old with a confirmed diagnosis of a solid tumor or acute leukemia - You are being treated with immunotherapy, targeted therapy, or chemotherapy - Your general health is good to moderate (ECOG 0–2) - Your blood counts, liver, and kidney function meet the required thresholds **You may NOT be eligible if...** - You do not meet the required blood count, liver function, or kidney function criteria - You have not signed informed consent - Your blood oxygen level or lung function is below acceptable limits Talk to your doctor to see if this trial is right for you.