title: Circulating Tumor Cells in Genitourinary Malignancies: An Evolving Path to Precision Medicine.
abstract: Precision medicine with molecularly directed therapeutics is rapidly expanding in all subspecialties of oncology. Molecular analysis and treatment monitoring require tumor tissue, but resections or biopsies are not always feasible due to tumor location, patient safety, and cost. Circulating tumor cells (CTCs) offer a safe, low-cost, and repeatable tissue source as an alternative to invasive biopsies. "Liquid biopsies" can be collected from a peripheral blood draw and analyzed to isolate, enumerate, and molecularly characterize CTCs. While there is deserved excitement surrounding new CTC technologies, studies are ongoing to determine whether these cells can provide reliable and accurate information about molecular drivers of cancer progression and inform treatment decisions. This review focuses on the current status of CTCs in genitourinary (GU) cancer. We will review currently used methodologies to isolate and detect CTCs, their use as predictive biomarkers, and highlight emerging research and applications of CTC analysis in GU malignancies.
authors.affiliation: Keck School of Medicine and Norris Comprehensive Cancer Center, Urology , Los Angeles, CA , USA.
authors.forename: Cory M
authors.initials: CM
authors.lastname: Hugen
authors.affiliation: Keck School of Medicine and Norris Comprehensive Cancer Center, Urology , Los Angeles, CA , USA.
authors.forename: Daniel E
authors.initials: DE
authors.lastname: Zainfeld
authors.affiliation: Keck School of Medicine and Norris Comprehensive Cancer Center, Medicine , Los Angeles, CA , USA.
authors.forename: Amir
authors.initials: A
authors.lastname: Goldkorn
keywords: bladder cancer; circulating tumor cells; liquid biopsy; molecular characterization; prostate cancer