Segmental Arterial Mediolysis Presenting as a Pancreatic Mass in a Pediatric Patient: A Case Report.

We describe a case of segmental arterial mediolysis (SAM) in a 2-year-old male who presented with symptoms of acute pancreatitis. SAM is a vascular entity of unknown etiology that involves medium-sized arteries in which the integrity of the vessel wall is compromised, resulting in increased susceptibility to ischemia, hemorrhage, and dissection. The clinical presentation is variable and can range from abdominal pain to more ominous findings of abdominal hemorrhage or organ infarction. This entity should be considered in the correct clinical setting and after other vasculopathies have been excluded. We aim to bring awareness to pediatric providers given this is a rare entity with variable presentation, which could be potentially life threatening.