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Gastric cancer: an opportunity for prevention

A multicenter validation of an endoscopic classification with narrow band imagi...

BACKGROUND AND STUDY AIM: The reliability and external validity of narrow band imaging (NBI) in the stomach have not been described consistently. The aim of the current study was to describe and estimate the accuracy and reliability of a simplified classification system for NBI in the diagnosis of gastric lesions. METHODS: Consecutive patients undergoing NBI endoscopy at two reference centers (n=85, 33% with dy...

A multicenter validation of an endoscopic classification with narrow band imagi...

BACKGROUND AND STUDY AIM: The reliability and external validity of narrow band imaging (NBI) in the stomach have not been described consistently. The aim of the current study was to describe and estimate the accuracy and reliability of a simplified classification system for NBI in the diagnosis of gastric lesions. METHODS: Consecutive patients undergoing NBI endoscopy at two reference centers (n=85, 33% with dy...

External validation of a classification for methylene blue magnification chromo...

Background: Conventional endoscopy has low sensitivity, specificity, and interobserver agreement for the diagnosis of gastric atrophy, intestinal metaplasia, and dysplasia. Magnification chromoendoscopy (ME) may optimize the evaluation of premalignant gastric lesions. Objective and Design: As part of a multicenter trial, we aimed at validating a previously proposed classification for gastric methylene blue ME ...

Web-based system for training and dissemination of a magnification chromoendosc...

AIM: To evaluate the use of web-based technologies to assess the learning curve and reassess reproducibility of a simplified version of a classification for gastric magnification chromoendoscopy (MC). METHODS: As part of a multicenter trial, a hybrid approach was taken using a CD-ROM, with 20 films of MC lasting 5 s each and an "autorun" file triggering a local HTML frameset referenced to a remote questionnair...

Spontaneous extensive esophageal tear with upper digestive haemorrhage treated ...

Fulminant hepatic failure: a Portuguese experience

BACKGROUND: Fulminant hepatic failure (FHF) is a rare condition. Several series have been reported either by individual centres or in multicentre studies but, to our knowledge, this is the first report from a Portuguese population and might be a good example of FHF cases in a SouthWestern European population. AIMS: To present the experience in FHF of a Portuguese Hepatogastroenterological Intensive Care Unit. ...

"Downhill" varices. A rare cause of esophageal hemorrhage

"Downhill" varices or upper esophageal varices are a rare cause of proximal digestive tract hemorrhage with only 16 cases described in the literature. In our series, hemorrhage due to "downhill" varices represents 0.1% of all acute esophageal variceal bleeding. Their etiology differs from that of the usual "uphill" varices secondary to portal hypertension, and the clinical management should be directed to vascu...

Sexual dimorphism in the human pelvis: Testing a new hypothesis

Sexual dimorphism in the human pelvis is inferentially related to parturition. Investigators disagree about the identification and obstetric significance of pelvic dimorphism. Benefiting from a large sample of complete skeletons from the Coimbra Identified Skeletal Collection, we show that the dimensions of the true pelvis (birth canal) that are most sexually dimorphic (that is, the dimensions of females are gr...

Casamentos exogâmicos : aspectos biológicos e culturais