Abstract Accessory mitral valve (AMV) is a rare anomaly of mitral valve
which often causes left ventricular outflow tract (LVOT) obstruction.
Different congenital anomalies, including bicuspid aortic valve, are
associated with this rare anomaly. Distinguishing AMV from other mitral
valve masses is sometimes difficult and can lead to unnecessary
diagnostic and therapeutic measures. We present a case report regarding
the AMV without LVOT obstruction primarily misdiagnosed as vegetation in
an adult. Keywords: Accessory Mitral Valve, Vegetation, Mass