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Real-time three-dimensional transthoracic echocardiographic visualisation of accessory mitral valve tissue in a 22-year-old man with multiple sclerosis.

A 22-year-old man, with a history of an ejection murmur in childhood, was referred to our echocardiographic laboratory from the Division of Neurology, where a diagnosis of multiple sclerosis was made after cerebrospinal fluid and magnetic resonance examinations. The patient had been complaining of asthenia, paraesthesia and sensitivity deficit for several months. A two-dimensional colour Doppler echocardiographic examination revealed the presence of a mobile mass in