Right colic artery pseudoaneurysm in a patient with rheumatoid arthritis: A case report.

To describe the clinical presentation, diagnosis, and endovascular treatment of a right colic artery (RCA) pseudoaneurysm in a patient with rheumatoid arthritis, highlighting its rarity as a complication of rheumatoid vasculitis. A woman in her early 50s with rheumatoid arthritis presented with a three-day history of epigastric pain, vomiting, and melena. Examination revealed anemia, purpuric rashes, and mild abdominal tenderness. Computed tomography (CT) angiography identified an RCA pseudoaneurysm. Following resuscitation and blood transfusion, selective superior mesenteric artery angiography and transarterial coil embolization were performed. The procedure was successful, leading to symptom resolution. RCA pseudoaneurysms are rare, usually resulting from trauma or pancreatitis, but can also arise from rheumatoid vasculitis. This is the first reported case of a RCA pseudoaneurysm due to rheumatoid arthritis. CT angiography is the preferred diagnostic tool, and coil embolization is an effective treatment for hemodynamically stable patients.