Median Arcuate Ligament Syndrome, also known as celiac artery compression syndrome, is related to pain disorder and lactose intolerance. An important gene associated with Median Arcuate Ligament Syndrome is ATP12A (ATPase H+/K+ Transporting Non-Gastric Alpha2 Subunit). The drug Morphine has been mentioned in the context of this disorder. Affiliated tissues include liver and t cells.