Functional Precision Medicine: Putting Drugs on Patient Cancer Cells and Seeing What Happens.

For too long, assays exposing patient tumor cells to drugs to identify active therapies have been dismissed as ineffective. In this issue of Cancer Discovery , two groups independently demonstrate clinical utility of such functional precision medicine assays in hematologic malignancies. See related article by Kornauth et al., p. 372 . See related article by Malani et al., p. 388 .