Athanasios D Sioulas

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Temporal and spatial variation in density, biomass and body size of littoral fish species associated with nearshore Posidonia oceanica meadows was studied over an annual cycle in an area of the eastern Mediterranean Sea. A total of 109,350 littoral fishes were collected, belonging to 34 families and 88 species. Density of fishes peaked during the summer due(More)
AIM To prospectively assess the knowledge and attitudes of medical students (MS), as tomorrow's physicians, about colorectal cancer (CRC) and its screening modalities. METHODS Three hundred fourth year MS of the University of Athens were enrolled in this survey. Their selection was random, based on student identification card number. All participants(More)
Gastrointestinal stromal tumors (GIST) represent the most common mesenchymal neoplasms affecting the gastrointestinal tract. Activating mutations in either the KIT or PDGFRa gene are the principal oncogenic triggers with the former accounting for more than 80 % of cases. In the small subset of GIST that are wild type for both the aforementioned changes,(More)
OBJECTIVE Intragastric balloon (IGB) is often used to achieve short-term weight reduction in morbidly obese patients. It is placed endoscopically for a 6-month-period either in the pre-bariatric surgery setting and also in cases where no bariatric surgery is planned. Prolonged implantation may be accompanied by serious complications. CASE REPORTS We(More)
Achalasia is a primary motor disorder of the esophagus diagnosed manometrically in the clinical setting of dysphagia to both solids and liquids. Currently established treatment options include pneumatic dilation, laparoscopic Heller myotomy, botulinum toxin injection performed endoscopically, oral agents that relax the lower esophageal sphincter and(More)
Background and study aims Full-spectrum colonoscopy (FSC) promises to increase adenoma detection by providing a wider field of view. The aim of this study was to compare adenoma miss rates of FSC with those of conventional colonoscopy complemented by right-colon re-examination using scope retroflexion (CC/R). Patients and methods At two tertiary endoscopy(More)
Background. Quality monitoring and improvement is prerequisite for efficient colonoscopy. Aim. To assess the effects of increased sedation administration on colonoscopy performance. Materials and Methods. During Era 1 we prospectively measured four colonoscopy quality indicators: sedation administration, colonoscopy completion rate, adenoma detection rate,(More)
Cholangioscopy is a valuable tool that permits direct endoscopic visualization of the bile ducts contributing to precise diagnosis and facilitating therapeutic interventions. This series demonstrates our current experience with direct peroral cholangioscopy by means of an ultraslim gastroscope. We also discuss feasibility as well as, advantages and(More)
An 80-year-oldmanwas admitted for cholestatic jaundice. He had undergone Billroth II gastrectomy 32 years earlier due to an ulcer. Magnetic resonance cholangiopancreatography revealed choledocholithiasis. At endoscopic retrograde cholangiopancreatography (ERCP), reverse sphincterotomy, balloon dilation of the sphincterotomy, and bile duct stone removal were(More)