Coronary vein aneurysm presenting as pancreatic pseudocyst.

This report, the first known published account, describes an unusual case of suspected pancreatic pseudocyst diagnosed by ultrasonography which at operation and subsequent arteriography was found to be a coronary vein aneurysm. Owing to the nonspecificity of ultrasonographic detection of vascular anomalies and neoplasms, arteriography is recommended when surgery is planned.