Femoral Artery Pseudoaneurysm with Disseminated Intravascular Coagulation as a Late-onset Complication of Total Hip Arthroplasty: A Case Report.

A 75-year-old man presented with a subcutaneous hemorrhage, swelling, and pain in the right lower limb. Computed tomography revealed a pseudoaneurysm of the right common femoral artery. Laboratory findings showed marked hyperfibrinolysis and thrombocytopenia, and he was diagnosed with disseminated intravascular coagulation (DIC) secondary to the pseudoaneurysm. We speculated that the pseudoaneurysm may have resulted from chronic mechanical interference caused by the total hip arthroplasty device that had been implanted five years previously. When DIC of unknown etiology occurs in patients with a history of orthopedic surgery, clinicians should therefore consider late complications of joint arthroplasty as potential underlying causes.