The long awaited subcutaneous formulation of pembrolizumab is not FDA-approved. We discuss its administration and toxicity & PK differences vs. IV use.Biotin supplementation can interfere with lots of labs cancer patients get routinely - Who knew? (Ahem, not me.) Link: https://doi.org/10.1200/OP-25-00693POLARIX 5-year Data: https://doi.org/10.1200/JCO-25-00925