We report two cases of heparin-induced thrombocytopenia (H.T.) associated with a disseminated intravascular coagulopathy (DIC). Heparin was prescribed after a cerebral infarct in the first case and after an orthopedic surgical procedure in the second case. The DIC induced neurological complications and the death of both patients. Heparin-induced thrombocytopenia is common but is exceptionally associated with neurological symptoms. Heparin-induced DIC is quite uncommon, since only 20 cases have been reported but neurological complications (focal deficits or disturbances of consciousness) are noted in about one third of the cases and the outcome is fatal in 60 percent of the cases. The treatment of heparin-induced DIC and thrombocytopenia is disappointing. Monitoring of the platelets count is warranted during heparin treatment to prevent this severe complication.