INTRODUCTION: Marfan syndrome is an inherited systemic disease affecting the aorta and multiple organ systems. Aortic dissection is the leading cause of mortality in Marfan syndrome. We describe a case of person well known to have Marfan syndrome, who had abdominal pain and diarrhea and eventually turned out to have type B aortic dissection. CASE DESCRIPTION/METHODS: This is a 33-year-old female known to have Marfan syndrome presenting with one week of dark diarrhea and nausea. Patient also had prior to presentation one day of crampy, sharp lower back and abdominal pain. CT scan abdomen and pelvis with IV and oral contrast done showed mild bowel wall thickening involving the ascending colon. Patient underwent EGD and colonoscopy were unremarkable. After the colonoscopy, she developed extreme abdominal pain in her lower quadrants radiating to the back. CT angiogram chest abdomen pelvis showed intact vasculature, but showed interval development of a moderate amount of new proteinaceous fluid seen within the pelvis, the hepatic and the splenic flexure. Patient underwent emergent open laparotomy for a concern of colonic perforation post colonoscopy. Patient was found to have partial bowel obstruction with a band of adhesion that came across the transverse colon. She underwent lysis of adhesions. Her abdominal persisted after the surgery, but was manageable with pain medications, so she was discharged home. Two days later, she presented with severe chest pain radiating to the back. Due to the high level of suspicion, she underwent CT angiogram chest abdomen pelvis showing aortic dissection arising just distal to the origin of the left subclavian artery and extending inferiorly along the abdominal aorta to the level of the right common iliac artery. Patient underwent emergent endovascular repair of the descending aortic dissection. Patient did well post operatively and was discharged home. DISCUSSION: Aortic dissection is a well known complication of Marfan syndrome, but only 10% of aortic dissections occur distal to the left subclavian. New abdominal pain in patients with Marfan should raise suspicion for aortic dissection, especially when the pain radiates to the back. Free fluid in the abdomen post colonoscopy should not be only seen as colonic perforation, but also a sign of vascular complication in patients with Marfan. Even when CT scan was negative a few days ago, repeating CT scans in the appropriate clinical setting can be life-saving.
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