Signs and symptoms include early satiety, nausea, vomiting, extreme "stabbing" postprandial abdominal pain (due to both the duodenal compression and the compensatory reversed peristalsis), abdominal distention/distortion, burping, external hypersensitivity or tenderness of the abdominal area, reflux, and heartburn. In infants, feeding difficulties and poor weight gain are also frequent symptoms. In some cases of<unk> , severe malnutrition accompanying spontaneous wasting may occur. This, in turn, increases the duodenal compression, which worsens the underlying cause, creating a cycle of worsening symptoms. Fear of eating is commonly seen among those with the chronic form of<unk> . For many, symptoms are partially relieved when in the left lateral decubitus or knee-to-chest position, or in the prone (face down) position. A Hayes maneuver, which corresponds to applying pressure below the umbilicus in cephalad and dorsal direction, elevates the root of the SMA, also slightly easing the constriction. Symptoms can be aggravated when leaning to the right or taking a face up position.
Superior mesenteric artery syndrome
Splenic infarction
Distal intestinal obstruction syndrome
Abdominal aortic aneurysm
Epiploic appendagitis
Ischemic colitis
Bowel infarction
Intestinal pseudo-obstruction