The prevalence of and risk factors for Barrett's esophagus in a Korean population: A nationwide multicenter prospective study.

Objective: The aim of this study was to evaluate the prevalence of Barrett's esophagus (BE) in the general Korean population by evaluating screening esophagogastroduodenoscopy. In addition, the risk factors for BE were identified.

Method: An esophagogastroduodenoscopy examination was performed in 25,536 subjects who had upper endoscopy screening from January 2006 to July 2006.

[A case of hepatocellular-cholangiocarcinoma invading the gallbladder].

Metastasis of hepatocellular carcinoma occurs at a relatively late stage of the disease. Hematogenous and lymphatic metastases are the most common routes for dissemination of tumor cells. Hepatocellular carcinoma also extends into the adjacent portal vein and bile ducts.

[A case of Kaposi's sarcoma associated with ulcerative colitis].

Kaposi's sarcoma is a rare and slowly progressive disease that primarily affects the skin but has an associated visceral involvement. It can occur in the HIV-positive patients or patients treated with immunosuppressants. However, it is extremely rare in the patients receiving the treatment for inflammatory bowel disease.