Clinical Characteristics of Microscopic Colitis in Korea: Prospective Multicenter Study by KASID

BACKGROUND/AIMS: Microscopic colitis (MC) encompasses collagenous and lymphocytic colitis and is characterized by chronic diarrhea. In cases of MC, colonic mucosae are macroscopically normal, and diagnostic histopathological features are observed only upon microscopic examination. We designed a prospective multicenter study to determine the clinical features, pathological distribution in the colon and prevalence of MC in Korea. METHODS: We prospectively enrolled patients having watery diarrhea no more than 3 times a day between March 2008 and February 2009. We obtained patient histories and performed colonoscopies with random biopsies at each colon segment. RESULTS: A total of 100 patients with chronic diarrhea were enrolled for a normal colonoscopy and stool exam. MC was observed in 22 patients (22%) (M:F 1.2:1; mean age, 47.5 years). Of those 22 patients, 18 had lymphocytic colitis and 4 had collagenous colitis. The entire colon was affected in only 3 cases (13.6%), the ascending colon in 6 cases (27.2%), the transverse colon in 3 cases (13.6%), and the left colon in 3 cases (13.6%). More than 2 segments were affected in 7 cases (31.8%). Nonsteroidal anti-inflammatory drug-associated MCs were observed in 4 cases (18.2%), 3 of which showed improved diarrhea symptoms following discontinuation of the medication. Frequently associated symptoms were abdominal pain and weight loss. Autoimmune diseases were observed in 4 cases (18.2%). Half of the 22 patients with MC improved with conservative care by loperamide or probiotics. CONCLUSIONS: In a prospective multicenter study of Korean patients with chronic diarrhea, the frequency of MC was found to be approximately 20%, similar to the percentage observed in Western countries. Therefore, the identification of MC is important for the adequate management of Korean patients with chronic diarrhea.

A Case of Small Intestinal Obstruction due to Bezoars Accompanied with Sump Syndrome / 대한소화기내시경학회지

Sump syndrome is one of the late complications of a side to side choledochoduodenostomy, but it is a rare malady. The anastomosis of the bile duct and small bowel results in exclusion of the distal limb of the common bile duct from drainage of bile with the potential formation of a sump. Food material and bile sludge may accumulate in distal segment of common bile duct and so this cause recurrent bile duct stones. Bezoars frequently result from disturbed passage of the gastrointestinal tract, especially after surgery, and it may develop various symptoms by irritating or obstructing the gastrointestinal tract. The bezoar accompanied with sump syndrome after choledochoenterostomy has not yet been reported in the literature. We report here on a case of small intestinal obstruction due to bezoars accompanied with sump syndrome.

A Case of Groove Pancreatitis with a Characteristic Pathologic Feature / 대한소화기학회지

Groove pancreatitis is a rare form of chronic pancreatitis in which scarring is found mainly in the groove between the head of the pancreas, duodenum, and common bile duct. The pathogenesis of groove pancreatitis is still unclear but seems to be caused by the disturbance of pancreatic outflow through Santorini duct. It is often difficult to differentiate preoperatively between groove pancreatitis and pancreatic head carcinoma. Whereas conservative management is effective, some patients with duodenal obstruction may undergo Whipple's operation. A few case of groove pancreatitis have been reported in Korea, and they were diagnosed only by clinical and radiological features. We experienced a case of groove pancreatitis who needed a surgical management because of severe duodenal obstruction. We report the case with a review of its characteristic pathologic findings.

Localized Esophageal Ulcerations after CyberKnife Treatment for Metastatic Hepatic Tumor of Colon Cancer / 대한소화기학회지

CyberKnife is an image-guided robotic system designed for stereotactic radiosurgery. It uses the combination of robotics and image guidance to deliver concentrated and accurate beams of radiation to intracranial and extracranial targets. Although the frameless nature of the CyberKnife allows tumors in the chest and abdomen to be treated as well, complications associated with CyberKnife treatment have not been established yet due to its short clinical experience. We describe a case of localized esophageal ulcerations after CyberKnife treatment for metastatic hepatic tumor of colon cancer.

A Case of Acute Cholecystitis Secondary to Hemobilia after Percutaneous Liver Biopsy / 대한소화기학회지

Percutaneous liver biopsy is well established for the diagnosis and follow-up of many liver diseases. Although it is rather safe, major complications, such as bleeding into the peritoneal or thoracic cavity, hemobilia, enteric perforation and intrahepatic hematoma, have been reported related to the procedure. Recently, incidence of such major complications has been decreased since the introduction of ultrasonography-guided liver biopsy. We report a case of 59-year-old female patient with acute cholecystitis secondary to hemobilia 2 days after ultrasonography-guided percutaneous liver biopsy.

Macro-aspartate Aminotransferase in a Patient with Chronic Hepatitis C / 대한소화기학회지

Macroenzymes are normal enzymes complexed with an immunoglobulin (usually IgG, rarely IgA or IgM). A number of macroenzymes have been reported in the literature. Among them, macro-AST has been detected in diseases such as acute and chronic hepatitis, various malignancies and autoimmune diseases, but usually not associated with any specific disease. We report a case of elevated AST activity in serum due to marco-AST formation in a female with chronic hepatitis C which was confirmed by AST isoenzyme electrophoresis. To our knowledge, this is the first report of macro-AST occurred in chronic hepatitis patient in Korea.

A Case of Giant Pedunculated Submucosal Lipoma Causing Intussusception of the Colon / 대한소화기내시경학회지

Intussusception is a relatively common cause of intestinal obstruction in children. However, it is quite uncommon in adults, representing < or =1% of intestinal obstructions in this patient population. Colonic lipoma is rare, usually small, and occurs mainly in the right colon, particularly in the cecum. They often occur in elderly women. Intermittent episodes of intussusception are not uncommon in patients with colonic lipoma but they are usually caused by larger pedunculated lipomas. Almost all gastrointestinal lipomas are submucosal or subserosal, and most are asymptomatic, even though they can cause abdominal pain, bowel obstruction, and gastrointestinal bleeding. Colonic lipoma with a dramatic presentation requiring urgent surgery is rare. Symptomatic lipomas or complicated cases require surgical or endoscopical intervention. We report a case of symptomatic giant pedunculated colonic lipoma causing intussusception requiring surgical intervention, with a successful recovery after surgery.

High-grade Hepatic Mucosa-associated Lymphoid Tissue (MALT) Lymphoma Probably Transformed from the Low-grade Gastric MALT Lymphoma

The Mucosa-associated lymphoid tissue (MALT) lymphoma, which was first described in 1983, is known to be caused by chronic Helicobacter pylori (HP) infection, which triggers lymphoid infiltration and formation of organized lymphoid tissue. In approximately two thirds of cases of MALT, the lymphoma has been observed to regress after treatment of H. pylori infection; this provides strong evidence of a causative role of HP in the etiology of MALT. We report a case of a 67-year-old female patient with a high-grade MALT lymphoma of the liver; this occurred six years after complete remission of a low-grade gastric MALT lymphoma and after complete eradication of H. pylori. there was no recurrence of the previous low-grade gastric MALT lymphoma. Based on radiological and pathologic findings, the high-grade MALT was considered to result from transformation of the low-grade gastric MALT lymphoma.

A Case of Hemolytic Uremic Syndrome with Hemorrhagic Colitis due to Escherichia coli O111 Infection / 대한소화기학회지

Shiga toxin producing E. coli (STEC) may cause severe hemorrhagic colitis followed by hemolytic uremic syndrome (HUS). In Korea, there had been a few case reports of HUS by STEC, mostly due to O157 serotype. The reports of HUS caused by STEC non-O157 serotype were rare. We report a sporadic case of HUS associated with hemorrhagic colitis. A 51-year-old woman was admitted to our hospital due to intractable abdominal pain and bloody diarrhea. Three days after admission, azotemia and microangiopathic hemolysis developed. E. coli, serotype O111 was identified. Conservative management with plasmapheresis resulted in a complete recovery.

The Current Status of Ulcerative Colitis-associated Colorectal Cancer in Korea: A KASID Study / 대한소화기학회지

BACKGROUND/AIMS: The number of patients with ulcerative colitis has steadily increased since the mid-1980s. As the risk of colon cancer increases with duration and extents, colitic cancers are expected to increase in number in Korea. We surveyed the current status of colitic cancers and provided the perspectives in Korea. METHODS: Korean Association for the Study of Intestinal Diseases (KASID) collected and descriptively analyzed a total of eleven cases of colitic cancers occurred between 1993 and 2003. RESULTS: The mean age at the diagnosis of colitic cancer was 49.3 years, and the mean duration of ulcerative colitis was 12.5 years. Of the diagnosed cases, 91% was associated with pancolitis, 28% had right colon cancers and 18.2% had multiple tumors. Colitic cancers diagnosed at Dukes' stage D were 36.3%. Stages at diagnosis were lower in patients with good compliance. Up to 2003, cumulative incidence ratio of colitic cancer to ulcerative colitis was estimated to be 0.5%, which was much less than the overall prevalence of 3.7% in the Western countries. This incidence was also less than the expected cumulative incidence ratio of 0.9%, which was estimated by adopting the average results of meta-analysis in the Western world. CONCLUSIONS: As the incidence of ulcerative colitis has not reached a plateau, and as the diagnosis of colitic caners are delayed in Korea, the cumulative incidence of colitic cancers might have appeared to be low. Geographic and racial factors, and the effect of preventive measures might have contributed to the lower incidence which remains to be proven. Since colitic cancers are expected to increase steeply in the near future in Korea, the importance of surveillance and prevention cannot be over-emphasized.

Expression of Cdx-2 Homeobox Gene in Intestinal Metaplasia and Gastric Adenocarcinoma / 대한소화기학회지

BACKGROUND/AIMS: The Cdx-1 and Cdx-2 genes are intestinal transcription factors that may be involved in the regulation of proliferation and differentiation of intestinal epithelial cells. The Cdx-1 and Cdx-2 are expressed in the epithelium of the small intestine and colon but not in the normal epithelium of the esophagus and stomach. Conversely, aberrant Cdx-2 expression is often observed in the esophagus and stomach. We investigated the expression and role of Cdx-2 in intestinal metaplasia and gastric adenocarcinoma. METHODS: The gastric tissues obtained endoscopically were analyzed by the reverse transcriptase-polymerase chain reaction and histology. The Cdx-1 and Cdx-2 mRNA expression was confirmed and analyzed according to updated Sydney classification. Then, immunohistochemical study with monoclonal anti-Cdx-2 antibody was performed with gastric adenocarcinoma obtained by surgical resection. RESULTS: The prevalence of Cdx-1 and Cdx-2 mRNA expression was significantly higher in mucosa with intestinal metaplasia than mucosa without intestinal metaplasia. In immunohistochemical study, nuclear staining of Cdx-2 was strong in metaplastic mucosa, but weak in adjacent normal gastric mucosa (p<0.001). The expression of Cdx-2 in gastric adenocarcinoma was lower than in metaplastic mucosa (p<0.001). The Cdx-2 expression was also detected in 97% of intestinal type gastric adenocarcinoma and 61.5% of diffuse type gastric adenocarcinoma (p=0.003). CONCLUSIONS: Aberrant expression of Cdx-2 is observed in intestinal metaplasia and a subset of gastric adenocarcinoma, which is predominant in intestinal-type gastric adenocarcinoma. Therefore, Cdx-2 may play an important role in gastric carcinogenesis, especially in intestinal type adenocarcinoma.

A Case of Klippel-Trenaunay-Weber Syndrome with Sigmoid Varices / 대한소화기내시경학회지

Colonic varix, which is a rare cause of lower gastrointestinal bleeding, can be developed by various diseases. Colonic variceal bleeding is more fatal than esophageal variceal bleeding. Klippel-Trenaunay-Weber syndrome is a rare congenital vascular malformation characterized by the clinical triad of bony or soft tissue hypertrophy, hemangioma and varicosities or vascular malformations. We report a 42-year-old female patient with fatal sigmoid variceal bleeding. She had dilated vessels over her body and face, and both superior and inferior vena cava were obstructed. She underwent an emergent operation due to uncontrolled massive bleeding from sigmoid varices. We report a case of Klippel-Trenaunay-Weber syndrome with literature review.

A Case of Fulminant Hepatic Failure in Wilson's Disease Combined with Systemic Lupus Erythematosus / 대한간학회지

Patients with systemic lupus erythematosus (SLE) have a chance of developing liver involvement in their lifetime. The main cause of liver involvement in SLE patients is previous treatment with hepatotoxic drugs or hepatotropic viral hepatitis. Wilson's disease is a hereditary disorder and is usually diagnosed in patients presenting either neuropsychiatric disorders or manifestations related to chronic liver disease. Fulminant hepatic failure as the initial manifestation of Wilson's disease is rare. The relationship between systemic lupus erythematosus and Wilson's disease has not been established. We report a case of a 12-year-old girl with SLE who presented fulminant hepatic failure as an initial manifestation of Wilson's disease. The diagnosis was established with decreased serum ceruloplasmin level and the presence of Kayser-Fleischer ring. We treated with repeated plasma exchange. Despite repeated plasma exchange she died of multi-organ failure on the 16th hospital day. Considering this case, Wilson's disease should be considered as a cause of fulminant hepatic failure, especially in juvenile age cases.

A Case of Churg - Strauss Syndrome with Multiple Colonic Ulcers / 대한소화기내시경학회지

Churg-Strauss syndrome or allergic granulomatosis and angiitis is an uncommon systemic vasculitis chracteristized by asthma, hypereosinophilia, mono or polyneuropathy, non-fixed pulmonary infiltrates, paranasal sinus abnormality and extravascular eosinophil infiltration. Gastrointestinal manifestations occur in about 42% of patients. However, ulcer formation in gastrointestinal tract mucosa is a rare manifestation, usually discovered upon laparotomy or autopsy. We experienced a case of 40-year-old woman with Churg-Strauss syndrome, who presented multiple colonic ulcers on colonoscopy. She also had bronchial asthma, polyneuritis, peripheral blood eosinophilia and hemorrhagic bullous skin lesions with extravascular eosinophil infiltration. She improved with high dose corticosteroid and cyclophosphamide. We report this case with a review of the literature.