Haemophilia A presented with abdominal pain.
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Partially calcified and expansile lesion within the left iliac crest involving the overlying iliopsoas muscle due to a hemophiliac pseudotumor.
Hemophilic pseudotumor is uncommon and usually seen in severe cases of hemophilia. They form as a result of multiple episodes of hemorrhage into bones or soft tissue spaces. Compression of local structures can cause pain. Extraosseous lesions are associated with increased soft tissue swelling. Intraosseous lesions can result in pathological fractures 1.
- 1. Lewis TR, Webb HR, Bell JP et al. Hemophilic pseudotumor. J Okla State Med Assoc. 2005 Oct;98(10):485-7.