However, the duration of therapy remains unclear and has to be answered in more prospective studies in the future [12,13]. This case report is a rare medical observation of cerebral thrombophlebitis with antithrombin III deficiency and the presence of anticardiolipin Ig M antibodies complicating coeliac disease in children. The gene discussed is SERPINC1; the disease is hyperinsulinemic hypoglycemia, familial, 4.