The positive results of anti-CD34 (Fig. 5B) showed that the interlobular vein in the portal vein dilated obviously and protruded into the hepatic parenchyma, and the interlobular vein occupied almost the whole area of the portal vein, suggesting that there may be portal hypertension, which is consistent with the clinical manifestation of the patient. The gene discussed is CD34; the disease is portal hypertension.