Evaluation of a distal pericallosal artery aneurysm visualized with 3-dimensional digital subtraction angiography: case report and treatment implications

3D-DSA was used to evaluate a small, distal pericallosal artery aneurysm and revealed a saccular bifurcation aneurysm not visualized with magnetic resonance angiography and conventional DSA. This additional resolution permitted the team to consider a surgical approach for a patient who would have otherwise been treated medically. This high-resolution technique is particularly useful in guiding clinical decision making in the context of aneurysms that carry a relatively broad differential diagnosis, potentially high interventional risk, and unclear morphology.