1. The document discusses 12 case reports describing various cases of pseudoaneurysms located in different areas including the aorta, aortic root, coronary arteries, and mitral-aortic intervalvular fibrosa.
2. The case reports describe pseudoaneurysms that developed after various cardiac surgeries and interventions as well as infections like endocarditis.
3. The pseudoaneurysms ranged in size from small to very large, in some cases fistulizing into other vessels or causing other complications. The cases illustrate the variety of clinical presentations and challenges in managing pseudoaneurysms in different anatomic locations.