Nephrotic syndrome (NS) is a consequence of the reduced ability of the glomerulus barrier to exclude proteins of intermediate size and other macromolecules from urine. Albumin and proteins that modulate the coagulation cascade are among the substances eliminated in urine. This is responsible of thromboembolic complication. The incidence of this extra renal complication is probably underestimated because of asymptomatic thromboembolic events. We report the case of a 23 years old man followed up for an idiopathic nephrotic syndrome since childhood who presented a large intracardiac thrombus complicated by distal embolisation of his two lower limbs, successfully treated by fogartisation-embolectomy and oral anticoagulation.