Cytogen, Inc. is a biotechnology company based in Seoul, South Korea, founded in 2010. It operates in the blood cancer cell-based liquid biopsy application business. The company offers cell isolators that enrich CTCs from human blood and/or body fluid using high-density microporous chips, automated immunofluorescent staining systems (IF stainers), and cell image analyzers that capture immunofluorescent images of cells stained with anti-EpCAM, -CD45, and CK antibodies. Its products are sold under the Smart Biopsy brand name.