- Discussion:
- extraarticular bleeding may involve muscles, nerves, blood vessels,
and even bones;
- slowly expanding hematoma will interfere w/ function & perfusion of
surrounding tissues;
- intramuscular hematomas that fail to resorb quickly lead to fibrosis,
contracture, cyst formation, or
myositis ossificans;
- bleeding into the calf muscles may cause a severe equinus deformity;
- bleeding into sheath of the iliacus muscle frequently causes paralysis
of
femoral nerve & flexion contracture of the hip;
- bleeding into soft tissues of forearm may produce ischemic paralysis
and
Volkmann's contracture;
- hemophilic pseudotumor
- results from subperiosteal hemorrhage leading to bone destruction
& new bone formulation leading to formation of large cystic mass;
- w/ improved coagulation therapy, pseudotumors are less frequently seen;
- treatment involves radical excision or amputation;
