Risk Factors for Asymptomatic Colon Diverticulosis / 대한소화기학회지

BACKGROUND/AIMS: The etiology of colon diverticulosis is related to a range of genetic, biological, and environmental factors, but the risk factors for asymptomatic diverticulosis of the colon are unclear. This study examined the risk factors for asymptomatic colon diverticulosis. METHODS: This retrospective study included examinees who underwent a colonoscopy for screening at the health check-up center of SAM Hospital between January 2016 and December 2016. The examinees with colon diverticulosis found by colonoscopy were compared with those without diverticulosis. The comparison factors were age, gender, alcohol consumption, smoking status, medical history, lipid profile, body mass index, visceral fat area, waist-hip ratio, and severity of a fatty liver. RESULTS: This study included 937 examinees and the overall prevalence of diverticulosis was 8.1% (76/937). Fatty liver was found in 69.7% (53/76) in cases of colon diverticulosis and 50.3% (433/861) in the control group (p=0.001). The average waist-hip ratio was 0.92±0.051 in colon diverticulosis and 0.90±0.052 in the control group (p=0.052). Multivariate analysis revealed the waist-hip ratio (OR=1.035, 95% CI 1.000–1.070, p=0.043), moderate fatty liver (OR=2.238, 95% CI 1.026–4.882, p=0.043), and severe fatty liver (OR=5.519, 95% CI 1.236–21.803, p=0.025) to be associated with an increased risk of asymptomatic colon diverticulosis. CONCLUSIONS: The waist-hip ratio, moderate fatty liver, and severe fatty liver are risk factors for asymptomatic colon diverticulosis. Central obesity, which can be estimated by the waist-hip ratio, and fatty liver might affect the pathogenesis of asymptomatic colon diverticulosis.

Risk Factors for Asymptomatic Colon Diverticulosis / 대한소화기학회지

BACKGROUND/AIMS: The etiology of colon diverticulosis is related to a range of genetic, biological, and environmental factors, but the risk factors for asymptomatic diverticulosis of the colon are unclear. This study examined the risk factors for asymptomatic colon diverticulosis.METHODS: This retrospective study included examinees who underwent a colonoscopy for screening at the health check-up center of SAM Hospital between January 2016 and December 2016. The examinees with colon diverticulosis found by colonoscopy were compared with those without diverticulosis. The comparison factors were age, gender, alcohol consumption, smoking status, medical history, lipid profile, body mass index, visceral fat area, waist-hip ratio, and severity of a fatty liver.RESULTS: This study included 937 examinees and the overall prevalence of diverticulosis was 8.1% (76/937). Fatty liver was found in 69.7% (53/76) in cases of colon diverticulosis and 50.3% (433/861) in the control group (p=0.001). The average waist-hip ratio was 0.92±0.051 in colon diverticulosis and 0.90±0.052 in the control group (p=0.052). Multivariate analysis revealed the waist-hip ratio (OR=1.035, 95% CI 1.000–1.070, p=0.043), moderate fatty liver (OR=2.238, 95% CI 1.026–4.882, p=0.043), and severe fatty liver (OR=5.519, 95% CI 1.236–21.803, p=0.025) to be associated with an increased risk of asymptomatic colon diverticulosis.CONCLUSIONS: The waist-hip ratio, moderate fatty liver, and severe fatty liver are risk factors for asymptomatic colon diverticulosis. Central obesity, which can be estimated by the waist-hip ratio, and fatty liver might affect the pathogenesis of asymptomatic colon diverticulosis.

Regression of esophageal varices during entecavir treatment in patients with hepatitis-B-virus-related liver cirrhosis

Recent studies suggest that liver cirrhosis is reversible after administering oral nucleos(t)ide analogue therapy to patients with hepatitis B virus (HBV) infection. However, few studies have addressed whether esophageal varices can regress after such therapy. We report a case of complete regression of esophageal varices during entecavir therapy in patients with HBV-related liver cirrhosis, suggesting that complications of liver cirrhosis such as esophageal varices can regress after the long-term suppression of HBV replication.

Regression of esophageal varices and splenomegaly in two patients with hepatitis-C-related liver cirrhosis after interferon and ribavirin combination therapy

Some recent studies have found regression of liver cirrhosis after antiviral therapy in patients with hepatitis C virus (HCV)-related liver cirrhosis, but there have been no reports of complete regression of esophageal varices after interferon/peg-interferon and ribavirin combination therapy. We describe two cases of complete regression of esophageal varices and splenomegaly after interferon-alpha and ribavirin combination therapy in patients with HCV-related liver cirrhosis. Esophageal varices and splenomegaly regressed after 3 and 8 years of sustained virologic responses in cases 1 and 2, respectively. To our knowledge, this is the first study demonstrating that complications of liver cirrhosis, such as esophageal varices and splenomegaly, can regress after antiviral therapy in patients with HCV-related liver cirrhosis.

Predictors of spontaneous viral clearance and outcomes of acute hepatitis C infection

BACKGROUND/AIMS: This study evaluated the predictors of spontaneous viral clearance (SVC), as defined by two consecutive undetectable hepatitis C virus (HCV) RNA tests performed > or =12 weeks apart, and the outcomes of acute hepatitis C (AHC) demonstrating SVC or treatment-induced viral clearance. METHODS: Thirty-two patients with AHC were followed for 12-16 weeks without administering antiviral therapy. RESULTS: HCV RNA was undetectable at least once in 14 of the 32 patients. SVC occurred in 12 patients (37.5%), among whom relapse occurred in 4. SVC was exhibited in 8 of the 11 patients exhibiting undetectable HCV RNA within 12 weeks. HCV RNA reappeared in three patients (including two patients with SVC) exhibiting undetectable HCV RNA after 12 weeks. SVC was more frequent in patients with low viremia than in those with high viremia (55.6% vs. 14.3%; P=0.02), and in patients with HCV genotype non-1b than in those with HCV genotype 1b (57.1% vs. 22.2%; P=0.04). SVC was more common in patients with a > or =2 log reduction of HCV RNA at 4 weeks than in those with a smaller reduction (90% vs. 9.1%, P or =2 log reduction of HCV RNA at 4 weeks was a follow-up predictor for SVC. Undetectable HCV RNA occurring after 12 weeks was not sustained. All patients receiving antiviral therapy achieved a sustained viral response. Antiviral therapy should be initiated in patients with detectable HCV RNA at 12 weeks after the diagnosis.

Is it necessary to delay antiviral therapy for 3-6 months to anticipate HBeAg seroconversion in patients with HBeAg-positive chronic hepatitis B in endemic areas of HBV genotype C?

BACKGROUND/AIMS: Spontaneous HBeAg seroconversion occurs frequently in the immune reactive phase in HBeAg-positive chronic hepatitis B (CHB). Therefore, observation for 3-6 months before commencing antiviral therapy is recommended in patients with alanine aminotransferase (ALT) levels that exceed twice the upper limit of normal (ULN). However, HBeAg seroconversion occurs infrequently in patients infected with hepatitis B virus (HBV) genotype C. The aim of the present study was to determine whether the waiting policy is necessary in endemic areas of HBV genotype C infection. METHODS: Ninety patients with HBeAg-positive CHB were followed prospectively without administering antiviral therapy for 6 months. Antiviral therapy was initiated promptly at any time if there was any evidence of biochemical (i.e., acute exacerbation of HBV infection or aggravation of jaundice) or symptomatic deterioration. After 6 months of observation, antiviral therapy was initiated according to the patient's ALT and HBV DNA levels. RESULTS: Only one patient (1.1%) achieved spontaneous HBeAg seroconversion. Biochemical and symptomatic deterioration occurred before 6 months in 17 patients (18.9%) and 5 patients, respectively. High ALT and HBV DNA levels were both independent risk factors for biochemical deterioration. Of 15 patients with HBV DNA > or =5.1x107 IU/mL and ALT > or =5xULN, biochemical deterioration occurred in 7 (46.7%), including 1 patient receiving liver transplantation due to liver failure. CONCLUSIONS: Spontaneous HBeAg seroconversion in patients with HBeAg-positive CHB is rare within 6 months. Biochemical deterioration was common and may lead to liver failure. Immediate antiviral therapy should be considered, especially in patients with high ALT and HBV DNA levels in endemic areas of genotype C infection.

Two Cases of Hepatic Sinusoidal Dilatation Mimicking Hepatic Metastases / 대한소화기학회지

Hepatic sinusoidal dilatation is a rare benign vascular disorder characterized by focal dilatation of the sinusoidal spaces. In most cases, the underlying etiology is unclear but it may be related to the impairment of venous outflow or sinusoidal infiltration by diverse causes. Diagnosing hepatic sinusoidal dilatation based soley on imaging study is not easy since there are no pathognomonic radiologic findings indicative of this condition. Recently, the authors experience two cases of hepatic sinusoidal infiltration. The first patient was a 53-year-old man detected to have multiple hepatic nodules on ultrasonography (US) during a routine medical check-up. The second patient was an 82-year-old woman with abdominal discomfort who was referred from local clinic with high suspicion of hepatic metastases on US. In both cases, CT scan demonstrated multiple nodules with rim enhancement on arterial phase that became iso-dense to adjacent liver parenchyma on delayed phase. On MRI, these nodules showed rim enhancement on arterial phase, had high signal intensity on T2 weighted images, and became iso-intense with partial defect on hepatobiliary phase. Because imaging studies could not exclude the presence of hepatic metastases, liver biopsy was performed and it demonstrated hepatic sinusoidal dilatation with well preserved reticulin fiber without any evidence of malignancy. Herein, we report two cases of idiopathic hepatic sinusoidal dilatation mimicking hepatic metastases.

Comparison of the Clinical Characteristics of Patients with Small Bowel and Gastric Anisakiasis in Jeju Island

BACKGROUND/AIMS: Anisakiasis is frequent in Jeju Island because of the people's habit of ingesting raw fish. This study evaluated the clinical characteristics of patients with small bowel anisakiasis and compared them with those of patients with gastric anisakiasis. METHODS: We retrospectively reviewed the medical records of 109 patients diagnosed with anisakiasis between May 2003 and November 2011. RESULTS: Of the 109 patients diagnosed with anisakiasis, those with suspicious anisakiasis (n=38) or possible anisakiasis (n=12) were excluded. The age and gender distributions did not differ between patients with small bowel anisakiasis (n=30; age, 45+/-13 years) and those with gastric anisakiasis (n=29; age, 46+/-10 years). The mean duration of hospitalization was 5.4+/-4.3 days for patients with small bowel anisakiasis and 0.5+/-1.7 days for patients with gastric anisakiasis. Small bowel anisakiasis was accompanied by leukocytosis (76.7% vs 25.5%, p=0.003) and elevated C-reactive protein levels (3.4+/-3.2 mg/dL vs 0.5+/-0.3 mg/dL, p=0.009). Contrast-enhanced abdominopelvic computed tomography showed small bowel wall thickening with dilatation in 93.3% (28/30) of patients and a small amount of ascites in 80.0% (24/30) of patients with small bowel anisakiasis. CONCLUSIONS: Compared with gastric anisakiasis patients, small bowel anisakiasis patients had a longer hospitalization time, higher inflammatory marker levels, and small bowel wall thickening with ascites.

A Case of Acute Pancreatitis and Acute Hepatitis Caused by Ingestion of Ceramium kondoi / 대한소화기학회지

In Korea, the use of herbal remedies is a common cause of drug-induced liver injury. However, the occurrence of both acute pancreatitis and acute hepatitis after taking herbal remedies has rarely been reported. Herein, we report a case of concurrent acute pancreatitis and acute hepatitis associated with Ceramium kondoi ingestion. A 58-year-old woman was diagnosed with advanced gastric cancer 7 months ago. Total gastrectomy and adjuvant chemotherapy was performed without complications. The patient had been well until recently, when she presented with severe abdominal pain after ingestion of Ceramium kondoi for 4 weeks. The laboratory findings demonstrated elevated liver enzymes and lipase, and abdominal computed tomography revealed pancreas swelling with fat infiltration. The diagnosis was made based on the diagnostic criteria for drug induced pancreatitis and the Russel Uclaf Causality Assessment Method scale for drug-induced liver injury. After cessation of Ceramium kondoi, she showed clinical and biochemical improvement.

Predictable Factors of Early Colorectal Cancer after Colonoscopic Polypectomy

BACKGROUND/AIMS: Colorectal cancer is the third most common cancer and the fourth leading cause of cancer death in Korea. Colonoscopic screening with removal of adenomas is an effective strategy for reducing the incidence and mortality of colorectal cancer. This study was conducted to investigate predictable factors of early colorectal cancer (ECC) in patients with advanced adenoma (AA), tumor in situ (Tis), and submucosal (SM) cancer diagnosed after colonoscopic polypectomy. METHODS: Between August 2003 and June 2012, a total of 1,001 patients who underwent colonoscopic polypectomy in Jeju National University Hospital were enrolled in this study. RESULTS: Patients were classified into four groups; non-AA, AA, Tis, and SM cancer. Compared to the AA group, the ECC group (n=50) had large adenoma size (12.2+/-5.9 mm vs. 15.3+/-6.5 mm, P15 mm (odds ratio [OR], 4.49; 95% confidence interval [CI] 2.40-8.38), distal location (OR, 2.59; 95% CI, 1.33-5.05), and diabetes mellitus (OR, 2.10; 95% CI, 1.07-4.43) were significantly associated with ECC. Of the 12 patients with SM cancer, 5 underwent additional operations and had no remnant carcinoma. CONCLUSIONS: Predictable factors of ECC after colonoscopic polypectomy may be adenoma size >15 mm, distal location and diabetes mellitus.

Usefulness of Positron Emission Tomography-Computerized Tomography Uptake according to Early Gastric Cancer Gross Morphology

BACKGROUND/AIMS: The role of 18F-fluorodeoxyglucose (18F-FDG) PET-CT for early gastric cancer (EGC) was undetermined due to its low sensitivity. The aim of this study was to assess the usefulness of 18F-FDG PET-CT according to endoscopic classification of EGC. MATERIALS AND METHODS: We retrospectively reviewed 206 patients who had undergone PET-CT due to gastric cancer from June 2009 to June 2012. Among those patients, 120 including 65 patients who underwent gastrectomy were analyzed. RESULTS: According to endoscopic gross morphology, 50 (41.7%) patients were classified as EGC and 70 (58.3%) patients were classified as advanced gastric cancer (AGC). Compared with the EGC group, the AGC group showed significantly higher rate of positive 18F-FDG uptake of primary lesions (98.6% vs. 28.0%, P<0.001) and lymph nodes (50.0% vs. 6.0%, P<0.001), and higher standardized uptake value max of primary lesions (7.65+/-3.51 vs. 4.82+/-2.18, P=0.012). Among 65 patients who underwent gastrectomy, PET-CT positive lesions were found in patients with tumor size greater than 3 cm (86.4% vs. 9.5%, P<0.001), lesions detected by stomach CT (90.9% vs. 9.5%, P<0.001) and PET-CT lymph node positive lesions (4.8% vs. 31.8%, P=0.025). Among 31 patients with EGC, elevated types (type I and IIa) showed no difference of positive 18F-FDG uptake compared with flat or depressed types (IIb, IIc, and III) (55.6% vs. 31.8%, P=0.253). CONCLUSIONS: 18F-FDG PET-CT has positive detection rate for EGC greater than 3 cm and there was no differences of 18F-FDG PET-CT uptake rates between elevated types and flat or depressed types of EGC.

Clarithromycin-resistant Helicobacter pylori Associated with 23S rRNA Point Mutations in Jeju Island / 대한소화기학회지

BACKGROUND/AIMS: The point mutations in 23S rRNA gene accounts for the majority of the clarithromycin resistance of Helicobacter pylori. This study aimed to investigate the association between the clarithromycin-resistance of H. pylori and the failure of primary H. pylori eradication therapy in Jeju Island. METHODS: Between April 2011 and October 2012, 6,937 patients underwent endoscopy, and H. pylori infection was evaluated in 2,287 patients (33.0%). Total of 110 patients with H. pylori infection were treated with proton pump inhibitor (PPI)-based triple therapy. The result of eradication was evaluated with urea breath test, histology and PCR which were conducted 4 weeks from the last dose of medicine. RESULTS: The patients who had point mutations were 33 (26.0%). A2142G and A2143G mutations were observed in 10 patients (7.9%) and 23 patients (18.1%). Among 110 patients treated with PPI-based triple therapy, the success rate of the eradication therapy was 52.7% (58/110) and 70.7% (58/82) by intention-to-treat and per-protocol analysis, respectively. Fifteen of the 24 patients who failed the eradication therapy showed point mutations; 1 patient (4.2%) showed A2142G mutation and 14 patients (58.3%) showed A2143G mutation. Patients with A2143G mutation H. pylori showed higher failure rate of 87.5%. Patients with A2142G mutation H. pylori showed similar failure rate compared to those of the patients with wild type H. pylori. CONCLUSIONS: In Jeju Island, the frequency of 23S rRNA point mutations is similar (26.0%) with other regions of Korea (15.8-31.3%). A2143G mutation is associated with the failure of H. pylori eradication.

Massive Life-threatening Lower Gastrointestinal Hemorrhage Caused by an Internal Hemorrhoid in a Patient Receiving Antiplatelet Therapy: A Case Report / 대한소화기학회지

A Dieulafoy lesion in the rectum is a very rare and it can cause massive lower gastrointestinal bleeding. An 83-year-old man visited our hospital. He had chronic constipation and had taken aspirin for about 10 years because of a previous brain infarction. He was admitted because of a recent brain stroke. On the third hospital day, he had massive hematochezia and suddenly developed hypovolemic shock. Abdominal computed tomography showed active arterial bleeding on the left side of the mid-rectum. Emergency sigmoidoscopy showed an exposed vessel with blood spurting from the rectal wall. The active bleeding was controlled successfully by an injection of epinephrine and two hemoclippings. On the fourth day after the procedure, he had massive recurrent hematochezia, and his vital signs were unstable. Doppler-guided hemorrhoidal artery band ligation was performed urgently at two sites. However, he rebled on the third postoperative day. Selective inferior mesenteric angiography revealed an arterial pseudoaneurysm in a branch of the superior rectal artery, as the cause of rectal bleeding, and this was embolized successfully. We report a rare case of life-threatening rectal bleeding caused by a Dieulafoy lesion combined with pseudoaneurysm of the superior rectal artery which was treated successfully with embolization.

Massive Life-threatening Lower Gastrointestinal Hemorrhage Caused by an Internal Hemorrhoid in a Patient Receiving Antiplatelet Therapy: A Case Report / 대한소화기학회지

A Dieulafoy lesion in the rectum is a very rare and it can cause massive lower gastrointestinal bleeding. An 83-year-old man visited our hospital. He had chronic constipation and had taken aspirin for about 10 years because of a previous brain infarction. He was admitted because of a recent brain stroke. On the third hospital day, he had massive hematochezia and suddenly developed hypovolemic shock. Abdominal computed tomography showed active arterial bleeding on the left side of the mid-rectum. Emergency sigmoidoscopy showed an exposed vessel with blood spurting from the rectal wall. The active bleeding was controlled successfully by an injection of epinephrine and two hemoclippings. On the fourth day after the procedure, he had massive recurrent hematochezia, and his vital signs were unstable. Doppler-guided hemorrhoidal artery band ligation was performed urgently at two sites. However, he rebled on the third postoperative day. Selective inferior mesenteric angiography revealed an arterial pseudoaneurysm in a branch of the superior rectal artery, as the cause of rectal bleeding, and this was embolized successfully. We report a rare case of life-threatening rectal bleeding caused by a Dieulafoy lesion combined with pseudoaneurysm of the superior rectal artery which was treated successfully with embolization.

Prevention of Viral Hepatitis and Vaccination / 대한내과학회지

Hepatitis viruses are most important cause of acute and chronic hepatitis. In past, hepatitis B virus was one of the major causes of acute hepatitis. Recently, around 60-70% of acute hepatitis is attributed to hepatitis A virus infection. In this article, we will discuss the route of hepatitis virus infection, how to prevent transmission of viral hepatitis and who should be immunized to each hepatitis viruses.

A Case of a Pharyngeal Impacted Fish Bone Foreign Body Detected by Finger Palpation / 대한소화기내시경학회지

Emergent endoscopy is needed in cases of a fish bone foreign body in the upper gastrointestinal tract. A fish bone foreign body is common in the oral cavity and pharynx and has a high rate of complications because of the characteristic shape. A diagnosis is very difficult when the foreign body penetrates and impacts the surrounding tissue. Computed tomography is useful for the diagnosis; however, direct removal would be impossible if the foreign body was not localized during endoscopy. If the foreign body is anchored to the oral cavity and pharynx, finger palpation is useful to find the impacted fish bone. We report here on a case of an endoscopically missed pharyngeal impacted fish bone foreign body that was finally detected by finger palpation and successfully removed by rescue endoscopy.

New Insight for HBV DNA and HBsAg Quantitation during Antiviral Therapy in Patients with Chronic Hepatitis B / 대한소화기학회지

Over the past decade, advances in the antiviral therapy in patients with chronic hepatitis B have enabled the sustained suppression of hepatitis B viral replication and the prevention of progressive liver disease. Hepatitis B surface antigen (HBsAg) has been used to diagnose patients with hepatitis B virus infection. Recently, test for quantitative HBsAg titers are available and on-treatment HBsAg quantitations are used to predict treatment outcome. Serum HBV DNA levels have been shown to predict natural course of chronic hepatitis B infection. The HBV DNA levels have been reported to be positively correlated with the development of cirrhosis, hepatocellular carcinoma and related death. The baseline and on-treatment levels of HBV DNA are important factors for predicting treatment outcomes. In this article, we will discuss the role of HBV DNA and HBsAg quantitation during antiviral therapy.

A Case of Peutz-Jeghers Syndrome Diagnosed by Wireless Capsule Endoscopy

Peutz-Jeghers syndrome (PJS), is a rare autosomal dominant hereditary disorder. Intestinal hamartomatous polyps in association with melanocytic pigmentation of the skin and mucous membranes characterize PJS. Patients with PJS often have complications associated with the polyps, such as intestinal obstruction, intussusception, acute or chronic gastrointestinal bleeding, and the development of various types of cancer. Enteroclysis, small bowel follow-through, and push enteroscopy are generally used to identify the presence and location of small bowel polyps. Wireless capsule endoscopy (CE) has been confirmed as a feasible, safe, and sensitive test for the surveillance of small bowel polyps in patients with PJS and could replace radiographic small bowel surveillance. Here, a case of PJS newly diagnosed by CE is reported. The patient, a 30-year-old man who had developed rectal polyps associated with anal extrusion 7 years previously, had six episodes of hematochezia.

A case of CMV-induced gastric ulcer / 대한내과학회지

A 59-year-old female with breast cancer, who had been treated with cancer chemotherapy and radiotherapy, visited the hospital with a 2-week history of epigastric pain. Upper gastrointestinal endoscopy showed multiple ulcers with gastric hypertrophy. In the biopsy specimen, no malignant cells were observed, but some cells were positive on immunochemistry examination for cytomegalovirus (CMV). Ganciclovir was administered for 2 weeks. Her symptoms improved and the immunochemistry finding of a subsequent gastric mucosal specimen was negative. However, the lumen of the gastric antrum was too narrow for the endoscope to pass the pylorus easily. A gastric perforation resulted and was treated with total gastrectomy and esophagojejunostomy, while an endoscopic stent was inserted to allow oral intake. Here, we report a case of gastric ulcer resulting from CMV infection and stenosis as a complication in an immunosuppressant patient.

Distribution of hepatitis C virus genotypes in Jeju Island / 대한간학회지

BACKGROUNDS/AIMS: The hepatitis C virus (HCV) genotype affects clinical outcomes of HCV infection, in terms of the response to antiviral therapy and progression of chronic liver diseases, and shows geographic differences in distribution. The aim of this study was to elucidate the HCV genotypes in patients with chronic HCV infection in Jeju, which is an island off the Korean peninsula. METHODS: The study population consisted of 162 patients with anti-HCV antibodies and HCV-RNA. HCV genotypes were determined using genotype specific primers. RESULTS: HCV genotype 2a predominated (62.3%), followed by genotype 1b (34.0%) and 2b (3.7%). The prevalence of genotypes differed significantly with age, with HCV genotypes 1 and 2 being more frequent in older and younger subjects (P=0.035), respectively. HCV-RNA levels were higher in patients with genotype 1 than in those with genotype 2 (P=0.001). HCV genotype was not significantly related to sex, clinical diagnosis and potential risk factors. CONCLUSIONS: HCV genotype 2a is most common in Jeju, followed by genotype 1b. Our results suggest that the distribution of the HCV genotype differs between regions in Korea.