Mitral and tricuspid valvulitis with small, sterile vegetations, called Libman-Sacks endocarditis, is occasionally encountered in systemic lupus erythematosus. The lesions are small (1 to 4 mm in diameter), single or multiple, sterile, pink vegetations with a way (verrucous) appearance. They may be located on the undersurfaces of the atrioventricular valves, on the valvular endocardium, on the chords, or on the mural endocardium of atria or ventricles.