The Potential of Angiogenin as a Serum Biomarker for Diseases: Systematic Review and Meta-Analysis.

Angiogenin (ANG) is a multifunctional angiogenic protein that participates in both normal development and diseases. Abnormal serum ANG levels are commonly reported in various diseases. However, whether ANG can serve as a diagnostic or prognostic marker for different diseases remains a matter of debate.