Abstract
Essential thrombocytosis is a disease belonging to the chronic myeloproliferative disease, and platelet function abnormalities are seen at a high rate in most cases. Not a few points still to be clarified in regard to the pathology, treatment, and prognosis of this disorder, and it is characterized by such phenomena as hemorrhage and thrombosis which seem on first glance to be incompatible. We experienced a case of protal hypertension due to thrombocytosis in a 52-year-old man who was associating with gigantic splenomegaly, esophageal varices, and gastric varices, for which esophageal transection and splenectomy were performed. During the 13th year after the operation he developed hematemesis due to a rupture of duodenal varices, and this was complicated by varices in the superior mesenteric vein. The bleeding in the ruptured varices was able to be stopped by endoscopic sclerotherapy.
