CD9 and Cirrhosis: The median fibulin‐4/CD9 values increased as liver lesions progressed, with a significant difference between CLD and Child–Pugh class A (P < 0.01), with an AUC of 0.8121, as well as between CLD and Child–Pugh class B‐C cirrhosis (P < 0.01), with an AUC of 0.8995.