TPS® is a tumor activity marker assay used to support prognosis, treatment monitoring, and patient follow-up for various epithelial cancers, including breast, colorectal, ovarian, and prostate cancer.

TPS® measures soluble fragments of cytokeratin 18, which is over-expressed in epithelial cells and particularly in many types of cancer. This information is crucial for early detection of cancer recurrence and the quick assessment of treatment efficacy.