Rapid screening for genitourinary cancers: mass spectrometry-based metabolic fingerprinting of urine Xiao Wang, Yuze Li, Jinhan Fan, Liuying He, Junyu Chen, Huihui Liu and Zongxiu Nie Abstract Genitourinary (GU) cancers are among the most common malignant diseases in men. Rapid screening is the key to GU cancers management for early diagnosis and treatment. Urine is a highly accessible specimen type and urine metabolic fingerprints (UMFs) reflect underlying metabolite signatures of GU cancers.