About 0.1-2% of patients receiving heparin develop heparin-induced thrombocytopenia type II (HIT II) which is caused by antibodies directed against heparin-platelet factor 4 (PF4) complexes. Activation of thrombocytes and endothelial cells can lead to thrombocytopenia, venous and arterial thrombosis or thromboembolic events 10-14 days after the first dose. HIT II has a high mortality rate because of pulmonary emboli, cerebrovascular accidents, myocardial and limb infarctions. A 55-year-old patient with HIT II presented with arterial and venous thromboses and a silent myocardial infarction. In addition, he showed extensive skin and mucosal necrosis, an uncommon complication. Rheologic therapy with danaparoid Natrium, alprostadil alfadex and acetylsalicylic acid in combination with percutaneous transluminal angioplasties as well as local and systemic antiinflammatory therapy prevented further progression of the disease.