Acute Inflammatory Pseudoaneurysm of the Gastroepiploic Artery in a Patient with Multiple Aneurysms: A Case Highlighting Systemic Vascular Remodeling.

A 52-year-old man with scoliosis and psoriasis vulgaris, treated with infliximab, presented with a large right gastroepiploic artery aneurysm (GEAA). Following surgical resection, additional aneurysms of the anterior communicating artery and abdominal aorta were identified. Histopathological examination revealed a pseudoaneurysm with organizing thrombus and marked acute inflammation, including neutrophilic infiltration of the medial wall. Despite negative cultures, an infection-related vascular insult could not be excluded. This case highlights a rare immune-mediated vascular pathology in the context of chronic inflammatory disease, emphasizing the potential role of acute inflammation and psoriasis-associated immune dysregulation in visceral artery aneurysm formation.