Multicenter Trial of Magnetic Mini-Mover for Pectus Excavatum

This is a non-randomized study in which otherwise healthy patients, ages 8-14, with severe pectus excavatum (PSI \> 3.5) will undergo the Magnetic Mini-Mover procedure outpatient surgery. The Magnimplant or Magnetic Mini-Mover device implant will surgically implanted on the sternum. Patients will be required to wear a custom-fitted orthotic brace, which houses the external magnet and records brace-wear compliance. They will undergo brace treatment for 18-24 months, enough to attempt to improve their PSI (\< 3.25). Patients will be seen in clinic at least monthly until treatment is complete and the magnimplant device will be explanted from their sternum.