An Incidentally Discovered Pedunculated Degenerative Cyst on the Aortic Valve

We report the case of a pedunculated cystic mass on the aortic valve discovered in a patient presenting for a routine echocardiogram. The highly mobile nature of the mass warranted prompt surgical removal to prevent cardioembolic complications. The mass was preoperatively thought to be a papillary fibroelastoma. However, the patient's history, mass morphology, and histopathology pointed toward a simple degenerative cyst-previously unreported on the aortic valve. This report describes this rare finding, discusses relevant differential diagnoses, and underscores the importance of surgical intervention in such cases.