American Board of Pathology (ABPath) Practice Test 2025 - Free Pathology Exam Practice Questions and Study Guide

When evaluating the risk of rupture for an aneurysm measuring 5-6 cm, research indicates that this specific size range correlates with a significant risk of rupture, typically cited around 25%. This risk is particularly pertinent for abdominal aortic aneurysms (AAAs).

Aneurysms of this size are concerning because larger aneurysms generally have a higher risk of rupture due to the increased wall tension and hemodynamic strain. Historical studies and clinical guidelines suggest that the risk escalates with size, and 5-6 cm is often considered a critical threshold where elective surgical repair may be advised to prevent catastrophic rupture.

The other options represent lower probabilities, which do not align with established clinical data regarding the rupture risk for aneurysms in this size category. Therefore, acknowledging that the rupture risk is substantive at this measurement demonstrates the importance of timely monitoring and potential intervention in patients presenting with aneurysms of this scale.