By combining drug sensitivity with genomic profiling of tumor cells, a study from St. Jude Children's Research Hospital with more than 800 patients has shown a wide diversity in drug sensitivity for pediatric acute lymphoblastic leukemia (ALL) and defined six patterns of response to treatment. “This work provides a framework for ‘functional precision medicine’,” corresponding author Jun Yang, vice chair of the Department of Pharmacy and Pharmaceutical Sciences at St. Jude Children's Research Hospital, told BioWorld.