Nondilated abdominal aortic rupture caused by acute type B aortic dissection

Area of Science:

• Vascular Surgery
• Cardiovascular Pathology
• Genetics

Background:

• Aortic dissection and rupture are critical cardiovascular emergencies.
• Rupture of the abdominal aorta, especially in younger individuals, is rare.
• Medial degeneration is a known risk factor for aortic pathologies.

Observation:

• A 31-year-old male presented with acute abdominal pain.
• Computed tomography revealed a type B aortic dissection and a large retroperitoneal hematoma.
• The abdominal aorta was of near-normal caliber despite the rupture.

Findings:

• Emergency open abdominal aortic repair was successfully performed.
• Histopathological examination of the aortic wall showed diffuse medial degeneration with significant elastin fragmentation.
• Genetic analysis did not identify any mutations associated with connective tissue disorders.

Implications:

• This case highlights the possibility of aortic rupture from medial degeneration without a clear genetic predisposition.
• Early diagnosis and surgical intervention are crucial for managing ruptured abdominal aorta.
• Further research may be needed to understand non-genetic factors contributing to aortic medial degeneration.