Case report Mandibular haemophilic pseudotumour containing a fluid-fluid level

Osseous haemophilic pseudotumours are uncommon. Mandibular haemophilic pseudotumours are rare, with only approximately 12 cases reported in the literature to date. We present imaging findings of a histopathologically proven mandibular haemophilic pseudotumour. A fluid-fluid level, hitherto not associated with this condition, is also described. Haemophilia A, transmitted as an X-linked recessive trait, is the most common heritable bleeding disorder (1). It is characterized by a deficiency in circulating plasma levels of function- ally normal clotting factor VIII:c. Haemophilic patients may bleed into various structures, some- times owing to trivial or imperceptible trauma. Haemarthrosis is the most frequent painful manifestation of haemophilia (1). Haemophilic pseudotumour (HP) is an extraarticular destruc- tion of bone resulting from pressure necrosis by a haematoma. Other common sites of haemorrhage include subcutaneous tissues, fascia and muscles.