Why are many possible biomarkers not reliable enough for diagnosing a single disease?

In the context of translational medicine, many candidate biomarkers are not reliable enough for diagnosing a single disease because they lack the necessary specificity. Most potential biomarkers are not unique to one condition; instead, they are frequently found across many different types of diseases.1

Because clinically reliable biomarkers are rare, researchers often employ biomarker pattern proteome analysis to improve diagnostic accuracy. By studying the expression profiles of hundreds of proteins in parallel, scientists can combine several relatively nonspecific biomarkers to create a more specific disease index. This approach reflects the broader goals of translational medicine, which seeks to overcome the limitations of individual diagnostic tools by integrating complex data and advanced computational methods to better characterize disease processes.12