SMA syndrome

Background

• Rare condition
• Occurs when the duodenum is compressed between the aorta and the superior mesenteric artery
• Can lead to partial or complete gastrointestinal obstruction at the level of the duodenum

Clinical Features

• Early satiety
• Nausea and vomiting, can be bilious
• Abdominal pain, mid-abdomen which may be improved with changes of position
• Abdominal bloating, especially after meals
• Bleching
• Weight loss
• Proximal small bowel obstruction

Differential Diagnosis

• See Abdominal Pain
• See Nausea and vomiting