Hemarthrosis (or haemarthrosis, plural h(a)emarthroses) is a
bleeding into
joint spaces. It usually follows
injury but occurs mainly in patients with a predisposition to
hemorrhage such as those being treated with
warfarin (or other
anticoagulants) and patients suffering from
hemophilia. In hemophilia it may occur spontaneously, and recurrent hemarthroses are a major cause of
disability in that patient group due to hemophilic arthropathy, requiring
synovectomy,
joint replacement and increased medical therapy to prevent further bleeding episodes, although it is controversial whether clotting factor administration adequately prevents hemarthroses.
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