Pediatric MALS and SMAS Program

Our multidisciplinary program is dedicated to the diagnosis and treatment of children affected by median arcuate ligament syndrome (MALS) and superior mesenteric artery syndrome (SMAS). Bringing together experts in surgery, interventional radiology, vascular surgery and gastroenterology, the program provides coordinated, patient-centered care with a focus on excellent outcomes.

Leveraging the latest minimally invasive techniques, our team is committed to delivering the safest and most effective therapies for these complex vascular compression syndromes.

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Conditions Treated

Tests and Treatments Offered

Diagnostic Tests

  • Duplex ultrasound: evaluates blood flow through the arteries and veins.
  • CT angiography: combines a CT scan with an injection of a special dye to produce pictures of blood vessels and tissues.
  • Upper GI series: X-ray examination of the upper gastrointestinal (GI) tract

Treatment Options

  • Robotic surgery – Robotic surgery is designed to offer a minimally invasive and highly precise approach to alleviate the instances of compression in either MALS, SMAS or nutcracker syndrome.     
    • MALS release: To treat some instances of MALS, parts of the median arcuate ligament are cut to reduce compression on the celiac artery and nerve system.
    • Duodenojejunostomy: To treat some instances of SMAS, a new connection is made in the small intestine to bypass the area of blockage.
    • Strong procedure: To treat some instances of SMAS, the duodenum is moved to avoid the pinching from nearby arteries.
  • Celiac plexus block: a nerve block injection into the celiac plexus (a group of nerves in the upper abdomen affected by MALS) that temporarily stops the nerves from sending pain signals to the brain.
  • Vascular stents: a small, typically mesh, tube that keeps blood vessels open to restore or maintain blood flow.



MALS and SMAS Program Q&A

General pediatric surgeon Alejandro Garcia answers common questions about the MALS & SMAS Program at Johns Hopkins Children’s Center.

Why Choose Johns Hopkins

High Volume Center

Our program has seen pediatric patients from across the United States to receive diagnosis and treatment.

Latest Surgical Technologies

We offer the latest in cutting edge robotic surgery options for the treatment of MALS, SMAS and associated conditions.

Pediatric Expertise

Our experts are specially trained to care for children and teens. We have experts in interventional radiology and celiac plexus block treatment, as well as vascular surgery techniques.

Our Team

Locations for Care

Consult Locations

Baltimore

David M. Rubenstein Child Health Building 
200 N. Wolfe St.
Baltimore, MD 21287
The exterior of the David M. Rubenstein Child Health Building.

Annapolis

Johns Hopkins Children's Center Pediatric Specialists - Annapolis
820 Bestgate Road
Suite 2D
Annapolis, MD 21401
annapolis bestgate location - pediatric and congenital heart center

Surgery Location

Baltimore

The Charlotte R. Bloomberg Children's Center Building
1800 Orleans St.
Baltimore, MD 21287
Johns Hopkins' Children's Center