Median Arcuate Ligament Syndrome (MALS): Signs, Symptoms, & Causes

Posted on 2024/08/31 by Laparoscopic Surgical Center of New York

Median Arcuate Ligament Syndrome (MALS) is a rare and complex condition that affects the abdominal blood vessels. This disorder can cause a range of debilitating symptoms, making it crucial for individuals to understand its underlying causes, signs, and available treatment options.


What is MALS?


MALS is a condition in which the median arcuate ligament, a fibrous band of tissue located in the upper abdomen, compresses or entraps the celiac artery, a major blood vessel that supplies blood to the stomach, liver, and other vital organs. This compression can lead to a reduction in blood flow, resulting in a variety of symptoms.


The median arcuate ligament is a normal anatomical structure, but in some individuals, it may be positioned lower than usual or be more prominent, causing it to press against the celiac artery. This compression can be exacerbated by certain factors, such as body position, breathing, and abdominal muscle contraction, leading to the development of MALS.


Signs and Symptoms of MALS


Individuals with MALS may experience a range of symptoms, which can vary in severity and impact their quality of life. Some of the most common signs and symptoms of MALS include:
 

  • Abdominal Pain: One of the primary symptoms of MALS is a persistent, dull, or aching pain in the upper abdomen, often radiating to the back or sides. The pain may worsen after eating, during exercise, or when bending forward.
     

  • Nausea and Vomiting: MALS can cause nausea and vomiting, particularly after meals, as the reduced blood flow to the digestive organs can disrupt normal function.
     

  • Weight Loss: Due to the difficulty in eating and digesting food, individuals with MALS may experience unintentional weight loss.
     

  • Postprandial Pain: Many people with MALS report experiencing intense abdominal pain shortly after eating, often referred to as "postprandial pain."
     

  • Diarrhea: Some patients with MALS may experience episodes of diarrhea, which can be a result of the reduced blood flow to the intestines.
     

  • Bloating and Fullness: Feeling bloated or a sense of fullness in the upper abdomen is another common symptom associated with MALS.
     

  • Fatigue and Weakness: The decreased blood flow to the digestive organs can lead to feelings of fatigue and weakness, particularly after meals or physical activity.


It's important to note that the severity and combination of these symptoms can vary widely among individuals with MALS, and some may experience only a few of these signs.


Causes and Risk Factors of MALS


The primary cause of MALS is the compression or entrapment of the celiac artery by the median arcuate ligament. However, several factors can contribute to the development of this condition:
 

  • Anatomical Variations: Some individuals may have a naturally lower or more prominent median arcuate ligament, which increases the likelihood of celiac artery compression.
     

  • Body Habitus: People with a thinner body type or a low percentage of body fat may be more prone to MALS due to the decreased cushioning around the abdominal structures.
     

  • Age and Gender: MALS is more commonly diagnosed in young to middle-aged adults, with a higher prevalence among women.
     

  • Trauma or Injury: Abdominal trauma or injury, such as from a car accident or sports-related incident, can lead to the development of MALS by altering the normal anatomy and positioning of the median arcuate ligament.
     

  • Underlying Medical Conditions: Certain medical conditions, such as Marfan syndrome, Ehlers-Danlos syndrome, or fibromuscular dysplasia, may increase the risk of MALS due to their effects on connective tissue and vascular structure.


It's important to note that the presence of these risk factors does not necessarily mean that an individual will develop MALS. However, understanding these factors can help healthcare providers identify and diagnose the condition more effectively.


Get in Touch with Laparoscopic Surgical Center of New York Today


Median Arcuate Ligament Syndrome is a complex and often misunderstood condition, but with the right knowledge and support, individuals can take an active role in managing their health and improving their quality of life. By understanding the signs, symptoms, and underlying causes of MALS, you can work with your doctor  to develop a personalized treatment plan that addresses your specific needs.


If you or a loved one are experiencing symptoms of Median Arcuate Ligament Syndrome, the Laparoscopic Surgical Center of New York can provide expert care and guidance. We specialize in the diagnosis and treatment of MALS, offering cutting-edge techniques and personalized treatment plans. Visit our office in New York, New York, or call (212) 879-6677 to book an appointment today.

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