The goal of this clinical trial is to find out which surgery works better to treat people with a rare condition called Superior Mesenteric Artery Syndrome (SMAS). This condition causes the duodenum to be squeezed between two arteries, leading to severe nausea, vomiting, and weight loss. The researchers are comparing two types of surgery: * One Anastomosis Gastric Bypass (OAGB) * Duodeno-jejunostomy (DJ) The main questions this study will answer are: * Which surgery improves symptoms and nutritional status better? * Which surgery leads to fewer complications and better quality of life? Participants will: * Be randomly assigned to one of the two surgeries * Be followed for 12 months after the operation * Complete follow-up visits and nutritional assessments * Answer questions about their symptoms and overall well-being
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Improvement in Postprandial Symptoms Scores
Timeframe: 12 months