Molecular subtypes of upper tract urothelial cancer: Setting the stage for precision therapy.

A comprehensive genomic characterization of a large, high-quality cohort of upper tract urothelial carcinomas (UTUCs) in this issue of Cancer Cell reveals that UTUCs can be divided into five DNA-based molecular subtypes. Feasibility data establish that molecular subtyping can be performed non-invasively by sequencing tumor DNA in urine.