Prevalence and topography of intestinal metaplasia in columnar lined esophagus.

OBJECTIVES: Barrett's mucosa is considered as a mosaic of three epithelial types but little is known about the topography of intestinal metaplasia in columnar lined esophagus. The aims of the study were to determine the prevalence of intestinal metaplasia within long and short segments of columnar lined esophagus and to analyze the distribution of the intestinal metaplasia within long segments of Barrett's esophagus. PATIENTS AND METHODS: The study was performed on the initial endoscopy carried out among 112 patients enrolled in an endoscopic surveillance program. Seventy-two patients with columnar mucosa extending more than 3 cm into the esophagus (group I) and 40 patients with a short segment of columnar mucosa (group II) had multiple biopsies according to a standardized protocol. 1163 biopsies were analyzed on the whole: 949 biopsies in group I and 214 biopsies in group II. RESULTS: Intestinal metaplasia was identified among 650 (68.5%) and 50 (23.4%) biopsies in groups I and II respectively (P<10-7). The proportion of biopsies with foci of intestinal metaplasia increased significantly with the length of the columnar mucosa. The diagnosis of Barrett's esophagus was confirmed in 100% of the patients in group I and in 45% of the patients in group II. In long segments of Barrett's esophagus, intestinal metaplasia was more frequently observed in the 2 upper thirds of the columnar mucosa that in the lower third (P<10-7). Detailed mapping of the distribution of epithelial types within the columnar lined esophagus identified three patterns of distribution of intestinal metaplasia within long segments of Barrett's esophagus: unifocal, multifocal and diffuse, in 5%, 56% and 39% of the patients respectively. Dysplasia was present in 15% of patients with long segments of Barrett's esophagus and 11% of patients with short segments (NS). CONCLUSION: The distribution of intestinal metaplasia within columnar lined esophagus is heterogeneous and three distinct patterns can be identified: unifocal, multifocal and diffuse. Considering the risk of sampling error, the current recommendations concerning the biopsy protocols are mandatory until the validation of new techniques such as chromoendoscopy or magnifying endoscopy.

Epidemiology of hepatocellular carcinoma in Finistère. Prospective study from June 2002 to May 2003.

OBJECTIVES: The aims of this prospective study were to evaluate the incidence of hepatocellular carcinoma (HCC) in Finistère, an administrative district of western France, and to highlight epidemiological characteristics. METHODS: From June 1st 2002 to May 31st 2003, all cases of HCC in Finistère were registered prospectively. Standardized incidence rates were calculated. RESULTS: One hundred and six cases of HCC were registered. Standardized incidence rates were 13.8/100000 among men and 0.8/100000 among women. Among the incident cases of HCC, 52% were discovered in patients consulting for symptoms, and 28% in patients undergoing screening. The new non-invasive diagnostic criteria of HCC were used in 60% of cases. HCC was associated with cirrhosis in 89 patients (84%). Excessive alcohol intake was the main cause of cirrhosis. In all, 27 patients (25.5%) received potentially curative treatment. CONCLUSION: Incidence of HCC is high in Finistère. The proportion of patients given potentially curative treatment is still low, illustrating how difficult screening can be when alcoholic cirrhosis predominates in the target population.

Changes in characteristics and outcome of acute upper gastrointestinal haemorrhage: a comparison of epidemiology and practices between 1996 and 2000 in a multicentre French study.

OBJECTIVE: To evaluate the main changes in characteristics, practices and outcome between 1996 and 2000 in patients admitted for an acute upper gastrointestinal haemorrhage (AUGIH). PATIENTS AND METHODS: All consecutive patients (n=1165) admitted for an AUGIH in four French administrative areas were entered into two separate 6-month studies conducted in 1996 (n=712) and 2000 (n=453). Epidemiological and biological characteristics, endoscopic haemostatic procedures and outcomes were compared. RESULTS: Patient characteristics remained unchanged between the two studies; the two main bleeding lesions were peptic ulcer and oesophagogastric varices (30.2 versus 31.1% and 22.5 versus 20.3%). The use of non-steroidal anti-inflammatory drugs or aspirin was more frequent in 2000 (26.5 versus 32.6%; P<0.03). Proton pump inhibitor preventative therapy was administered in less than 15% of patients with a high risk of peptic ulcer bleeding in each period. In patients admitted for varices bleeding, the use of endoscopic haemostatic ligation increased (17.1 versus 40%; P<0.001), with a concomitant decrease in endoscopic sclerotic therapy (76.1 versus 37.5%; P<0.001). We observed a significant decrease in AUGIH mortality in the whole group (11.7 versus 7.2%; P=0.03), and particularly in the subgroup of cirrhotic patients (19.5 versus 11.1%; P=0.05) whatever the source of their bleeding. CONCLUSION: Our time-trend evaluation of changes in AUGIH characteristics revealed that peptic ulcer and varices were still the two most frequent bleeding lesions. In patients with varices bleeding, endoscopic ligation became the routine standard treatment instead of varices sclerosis. The mortality rate decreased significantly over the 5-year study period in the whole group and particularly in the subgroup of cirrhotic patients.

Acute upper gastrointestinal bleeding in patients with liver cirrhosis and in noncirrhotic patients: epidemiology and predictive factors of mortality in a prospective multicenter population-based study.

GOALS: To assess epidemiologic features and predictive factors of mortality of acute upper gastrointestinal bleeding (UGIB). STUDY: During a 6-month period, a prospective population-based study including all the UGIB occurring in a geographic area of 3 million people was conducted. Data from cirrhotic patients were compared with those of noncirrhotic patients. RESULTS: A total of 2,133 UGIB were recorded, 21.9% in cirrhotic patients (n = 468). Endoscopic hemostasis was performed in 46.5% and 8.3% in cirrhotic and noncirrhotic patients, respectively (P < 0.001). Mortality during hospitalization was 23.5% in cirrhotic patients and 11.2% in noncirrhotic patients (P < 0.001). Six independent predictive factors of mortality were observed in both patient groups: a prothrombin level less than 40%, an UGIB occurring in inpatients, a concomitant digestive carcinoma, a hematemesis revealing the UGIB, a recent use of steroid drugs, and age over 60 years. Four other predictive factors of mortality were also identified in noncirrhotic patients. CONCLUSIONS: Although epidemiologic features, clinical course, management, and prognosis of UGIB were quite different in cirrhotic and noncirrhotic patients, the majority of predictive factors of mortality were the same in both patient groups. These data underline the major role of debilitated status and hepatic failure in the prognosis of UGIB in cirrhotic patients.

Epidemiology and long term survival of gastric carcinoma in the French district of Finistere between 1984 and 1995.

OBJECTIVES: The aims of this study were to evaluate trends in incidence, clinical characteristics, treatment regimen and prognosis of gastric carcinoma in the area of Finistere (France) during a 12-year period. METHODS: Between 1984 and 1995, the Finistere Registry of GastroIntestinal Tract Tumors listed 2 139 patients with gastric carcinoma in a population of 838 627 inhabitants. Curative resection and operative mortality were analyzed by logistic regression. Prognostic factors were determined using the Kaplan-Meier method and the Cox model. RESULTS: When comparing the second period (1990-1995) to the first period (1984-1989) we observed: a) a decrease of standardized incidence (13.2 vs. 15.6/100 000 inhabitants/year in males and 5.4 vs. 7.0/100 000 inhabitants/year in females); b) a significant increase of linitis plastica (21.4% vs. 10.9%) and infiltrative tumors (53.1 vs. 31.2%) (P<0.0001); c) no variation in tumor stage at diagnosis; d) a significant increase in curative resection (65.7% vs. 45.0%; P<0.0001); e) no variation in operative mortality; f) the absence of improvement of survival rate; the latter was 29% at 2 years, 19% at 5 years and 11% at 10 years during the second period. Multivariate analysis showed that the main prognostic factors of gastric carcinoma were age, tumor stage and the type of surgical procedure. CONCLUSION: This study showed a decrease in the incidence of gastric carcinoma over time and an increase of linitis plasticia and infiltrative forms. Despite improvement in management of patients, the global prognosis of gastric carcinoma did not improve significantly over a 12-year period of observation.

Factors associated with liver steatosis and fibrosis in chronic hepatitis C patients.

UNLABELLED: Liver steatosis is a common finding in patients infected with hepatitis C virus (HCV). Host and viral factors have been associated with steatosis, but their relative contributions have not been clearly addressed. It has been suggested that steatosis plays a role in the progression of liver fibrosis. AIMS: To assess: a) factors associated with steatosis in patients infected with hepatitis C virus; b) their impact on liver fibrosis. PATIENTS AND METHODS: Three hundred and fourteen untreated patients were included. Lifetime alcohol consumption was estimated. Liver fibrosis, inflammation and necrosis were assessed using the METAVIR score. Body mass index (BMI) was determined. The scoring system for steatosis was as follows: 0, no steatosis; 1, less than 10%; 2, 10% to 30%; 3, 30% to 70%; 4, more than 70% of hepatocytes affected. RESULTS: In univariate analysis, steatosis was associated with elevated BMI (P=0.001), excessive alcohol intake (P=0.005), genotype 3 (P<0.001) and moderate to severe histological activity (P=0.01). Multivariate analysis showed that steatosis correlated with two independent factors: genotype 3a (OR=60.7; 95% CI: 7.6-483.4) (P<0.001) and BMI (OR=4.86; 95% CI: 1.8-13.15) (P=0.002). In univariate analysis, severe fibrosis (F2-F3-F4) was associated with older age (P<10(-5)), male gender (P=0.001), disease duration (P<0.006), BMI (P<10(-4)), alcohol intake (P<10(-6)), severity of histological activity (P<10(-5)) and steatosis (P<10(-6)). In multivariate analysis, three independent factors were associated with severe fibrosis: disease duration > 10 years (OR=3.17; 95% CI: 0.65-15.4) (P=0.015), presence of steatosis (OR=3.17; 95% CI: 1-9.99) (P<0.049) and genotype 3a (OR=5.56; 95% CI: 1.4-22.1) (P=0.015). CONCLUSION: In patients with chronic hepatitis C, steatosis is significantly associated with genotype 3 infection and high BMI. Steatosis is an independent risk factor associated with severe fibrosis. These results have major implications for the management of patients with chronic hepatitis C.

Infrequent p16/CDKN2 alterations in squamous cell carcinoma of the oesophagus.

Loss of heterozygosity (LOH) on chromosome 9 and p16 (MTS1/CDKN2) gene mutations have been reported in various human cancers. The present study aimed to determine the prevalence of LOH in 100 oesophageal squamous cell carcinomas (OSCCs) by typing microsatellite loci and mutations of the p16 gene. The methods used included denaturing gradient gel electrophoresis (DGGE) and DNA sequencing of exon 2. LOH was found in 14.7% of the OSCC cases. Six gene alterations were identified in exon 2. They consisted of three deletions and the same polymorphism in three samples. The relatively low rate of p16 mutation compared with the frequency of LOH suggests the possible involvement of another tumour suppressor gene located on chromosome 9 in oesophageal carcinogenesis.