A patient with a history of Marfan’s syndrome presents to th…

A patient with a history of Marfan’s syndrome presents to the emergency department with sudden-onset, severe “tearing” chest and back pain. Based on the clinical history and the sagittal image of one of the great vessels provided, what is the most likely diagnosis? 

A 74-year-old male with a history of heavy smoking presents…

A 74-year-old male with a history of heavy smoking presents to the ER with sudden-onset severe back pain, hypotension, and a palpable abdominal mass. An emergency ultrasound demonstrates a dilated infrarenal aorta measuring 5.2 cm with a large, poorly defined, heterogeneous fluid collection in the left paravertebral/retroperitoneal space representing blood. What is the most likely diagnosis?