Summary

A young male patient was evaluated for a cardiac cause of ischaemic stroke. In the work-up, a tumour was detected on the subvalvular apparatus of the mitral valve for which operative removal was scheduled. A port-access procedure was applied as a novel way of treatment. On thoracoscopic intracardiac inspection, however, multiple tumours were seen attached to the chordae tendineae and to the anterior leaflet of the mitral valve. It was decided to not to perform a plasty but to remove the valve in toto and insert a mechanical valve prosthesis. The tumours were diagnosed as multiple giant Lambl's excrescences.