Median arcuate ligament

The Median Arcuate Ligament (MAL) is an anatomical structure found in the human body. It is a fibrous arch that crosses in front of the aorta, just above the coeliac trunk. The ligament is formed by the right and left diaphragmatic crura, which are two tendinous structures that extend downward from the diaphragm.

Etymology

The term "Median Arcuate Ligament" is derived from the Latin words "medius" meaning middle, "arcuatus" meaning arched, and "ligamentum" meaning band. Thus, the term can be translated as "middle arched band".

Anatomy

The Median Arcuate Ligament is a part of the posterior abdominal wall. It is located at the level of the first lumbar vertebra, crossing in front of the aorta and behind the lesser omentum and the stomach. The ligament is formed by the medial edges of the diaphragmatic crura on either side of the aortic hiatus. The crura are tendinous structures that extend downward from the diaphragm and give it stability.

Clinical Significance

In some individuals, the Median Arcuate Ligament can compress the coeliac trunk, a condition known as Median Arcuate Ligament Syndrome (MALS). This can lead to symptoms such as abdominal pain, weight loss, and nausea. Diagnosis is typically made through imaging studies such as CT or MRI, and treatment often involves surgical release of the ligament.

Related Terms

• Diaphragm (anatomy)
• Coeliac trunk
• Median Arcuate Ligament Syndrome

See Also

• Anatomy of the human body
• Abdominal pain
• Weight loss

Median arcuate ligament gallery

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  Gray's Anatomy illustration of the median arcuate ligament