
Houston--Nuclear matrix protein 22 (NMP22) is to bladder cancer as PSA is to prostate cancer, perhaps better. That is the implication of a recently published, prospective, multi-institution study showing the point-of-care NMP22 assay (BladderChek, Matritech, Newton, MA) has a sensitivity of 55.7% and a specificity of 85.7%. In contrast, cytology was found to have lower sensitivity (15.8%) but higher specificity (99.2%).