In his first blog for the Dental Elf Rajpal Tattar take a look at a review of the diagnostic accuracy of salivary biomarkers for the detection of oral squamous cell carcinoma (OSCC). The review considers two biomarkers, cytokeratin 19 fragment (CYFRA 21-1) and for matrix metalloproteinase-9 (MMP-9) but there is no conclusive evidence for either at present.