Synovial Cyst of the Elbow: An Exceptional Complication of Arteriovenous Fistula

Arteriovenous fistulas are known to be associated with various complications, especially thrombosis, stenosis, infection and pseudoaneurysms. Synovial cyst is an exceptional complication. We report a case of 71-year-old male who presented painful swelling at the left elbow two months after barchio-basilic arteriovenous fistula confection. The diagnosis of arteriovenous fistula aneurysm was made. Explotory surgey found a cystic mass which was completely resected. The pathologic examination of the specimen confirmed the diagnosis of a synovial cyst. This case highlights the possible occurrence of synovial cyst as an exceptional complication of arteriovenous fistula mimicking aneurysm clinical presentation.