Abstract
We report a rare case of bilateral hemorrhagic bone cysts of the mandible in a patient with idiopathic thrombocytopenic purpura (ITP).A 12-year-old boy with ITP was examined to evaluate a swelling in the right side of the mandible. The initial panoramic radiograph showed multilocular radiolucent lesion resembling a hemophilic pseudotumor. Before operation, 10U of platelets were transfused. Under local anesthesia, fenestration was performed, and the involved tooth (right third molar) was extracted.Microscopic examination of a biopsy spcimen revealed granulation tissue associated with fresh and old hemorrhage and hemosiderin deposition. A histopathologic diagnosis of hemorrhagic bone cyst was made.After 5 years, the patient complained of swelling in the left side of the mandible. Ragiographic examination showed a multilocular radiolucent lesion that similar to the previous lesion. Before operation, 20U of platelets were transfused. While the patient was under general anesthesia, fenestration was performed, and I 5 6 7 8 were easily extracted. Primary hemostasis was completely achieved, and postoperative bleeding did not occur at either operation.The results suggested that hemorrhagic bone cysts in ITP patients are similar ragiographically, microscopically to hemophilic pseudotumors.
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