Serum Procalcitonin in Patients with Acute Liver Failure

Procalcitonin (PCT) is a known diagnostic marker of bacterial infection. There are no previous reports of PCT concerning acute liver failure (ALF). We evaluated the clinical value of serum PCT levels in patients with ALF. Forty-four patients with acute hepatitis (19 men and 25 women; median age, 40 years; range, 20-79 years) were retrospectively enrolled from January 2001 and June 2015. PCT levels were measured by saved serum samples obtained within 3 days after admission. ALF was defined as prothrombin time (PT) < 40% regardless of hepatic encephalopathy. Serum PCT levels were significantly higher in the patients with ALF ( = 16) than in those with non-ALF ( = 28) [0.25 (0.13-2.66) ng/mL vs. 0.165 (0.03-1.08), = 0.00967]. Creatinine, total bilirubin, and direct bilirubin were positively correlated, and PT was negatively correlated with PCT. Receiver operating characteristic curve analysis showed an area under the curve of 0.74 for detecting ALF. With a PCT cut-off value of 0.5 ng/mL, the presence of ALF could be demonstrated with low sensitivity (37.5%) and high specificity (96.5%) with high positive (85.7%) and negative (72.9%) predictive value. Multivariate analysis showed that PCT was an independent factor associated with the presence of ALF. The cumulative survival rate was also significantly lower in patients with PCT ≥ 0.5 ng/mL ( = 0.0314), but it was not an independent prognostic factor. Serum PCT level was significantly higher in patients with ALF.