Retroperitoneal haematoma associated with low molecular weight heparin

Enoxaparin (a low molecular weight heparin) has been used extensively for its antithrombotic properties. Complications of its haemorrhagic side-effects have previously been described. We report two cases of extensive retroperitoneal haematoma requiring blood transfusion and inotropic support. One patient developed acute renal failure and did not respond to intensive resuscitative efforts.