[The blue toe syndrome and its pathogenic significance. A case report].

A 64-years-old woman complained of fixed cyanosis and rest pain of the 2nd, 3rd and 4th toes of the right foot, after a sudden onset one month previously to the clinical examination. The diagnosis of "blue toe syndrome" was then made. She was in a post-menopause state, with no hormonal substitution therapy, complaining also of obesity, arterial hypertension and hyperlipidemia, under medication but no laboratory control.