Superior Mesenteric Artery Syndrome (SMAS)

  • Definition: Compression of third duodenal segment between SMA and aorta.
  • Symptoms: Postprandial fullness, bilious vomiting, weight loss.
  • Diagnosis: CT or upper-GI series showing duodenal dilation and narrowed angle.
  • Treatment: Nutritional rehabilitation; small frequent meals; duodenojejunostomy if refractory.
  • Follow-Up: Weight gain monitoring; repeat imaging if symptoms persist.

Celiac Artery Compression Syndrome

  • Definition: Extrinsic compression of the celiac trunk by the median arcuate ligament.
  • Symptoms: Postprandial epigastric pain, weight loss, sometimes bruit on exam.
  • Diagnosis: Doppler ultrasound or CT angiography demonstrating ligament compression.
  • Treatment: Surgical ligament release; angioplasty or stenting if needed.

Follow-Up: Symptom assessment and vascular imaging post-op.