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Background and study aims: Portal hypertensive gastropathy (PHG) is an important complication of portal hypertension (PHT) in cirrhotic patients. We aimed in the current study to investigate the validity of serum serotonin as a probable non-invasive marker for PHG in cirrhotic patients with PHT. We conducted this study on 100 HCV-related cirrhotic patients divided into three groups according to their endoscopic findings; group I: patients with no endoscopic signs of PHG; group II: patients with mild PHG; and group III: patients with severe PHG. All subjects had routine laboratory investigations, serum serotonin level using ELISA kits, calculation of Child’s score, abdominal ultrasound, and upper GIT endoscopy.Results: Serum serotonin was significantly higher in those with PHG than those without (t= 5.128, p &lt;0.001). Moreover, it was significantly higher in patients with severe degree of PHG than those with mild PHG (t=7.357, p&lt;0.001). Furthermore, a significant positive correlation was observed between serum serotonin and Child Pugh score (t=7.357, p&lt;0.001). Roc curve analysis revealed that serum serotonin at a level ˃ 26.5 ng/ml had a 78.82% sensitivity, 73.33% specificity, and accuracy of 78% to discriminate between those with signs of PHG and those without.Conclusion: Serum serotonin is a valuable non-invasive marker of PHG in HCV-cirrhotic patients. Furthermore, its serial measurements could be used to monitor disease progression.

Serum serotonin as a non-invasive marker of portal hypertensive gastropathy in Egyptian patients with HCV-related liver cirrhosis