APSA Pediatric Surgery Library combines Pediatric Surgery Not a Textbook (NaT) with APSA ExPERT, a powerful platform for earning MOC CME credits -- all powered by Unbound Medicine. Explore these free sample topics:
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Vascular rings (VR) comprise a spectrum of compressive disorders of the trachea and/or esophagus due to an abnormality in the embryologic development of the aortic arch complex. Symptoms are varied and can present a diagnostic challenge because of their nonspecific nature.